Company Details
telefonica
119,880
1,279,598
517
telefonica.com
160
TEL_2590753
Completed


Telefónica Company CyberSecurity Posture
telefonica.comTelefónica is today one of the largest telecommunications companies in the world in terms of market capitalisation and number of customers. We have the best infrastructure, as well as an innovative range of digital and data services; therefore, we are favorably positioned to meet the needs of our customers and capture growth in new businesses. We are sensitive to the new challenges demanded by society today and, therefore, we provide the means to facilitate communication between people, providing them with the most secure and cutting-edge technology. Our vision is focused on technology making people's lives easier and our aim is to promote progress in that direction, so that technology can make a positive impact on the world both socially and environmentally, and, ultimately, so as to provide value and trust in an ever-changing and accelerating world. Digital life is life itself, and technology is an essential part of being human. We want to create, protect and boost connections in life so people can choose a world of unlimited possibilities. We want to be a company in which our clients, employees, suppliers, shareholders, and society in general can trust. In order to achieve this, we communicate our strategy, business model and most relevant data to our stakeholders in a clear and transparent manner, so as to show the company's ability to create value.
Company Details
telefonica
119,880
1,279,598
517
telefonica.com
160
TEL_2590753
Completed
Between 550 and 599

Telefónica Global Score (TPRM)XXXX

Description: Movistar Fined €300,000 for GDPR Violation in Spain On December 22, 2025, Spain’s Data Protection Agency (AEPD) imposed a €300,000 fine on Telefónica Móviles, operating as Movistar, for violating the EU’s General Data Protection Regulation (GDPR). The penalty stems from the unlawful processing of personal data during a mobile phone line transfer, where customer information was mishandled. The AEPD ruled that Movistar failed to comply with GDPR requirements, though the company has one month to appeal the decision. The case highlights ongoing regulatory scrutiny over telecom providers’ data handling practices under EU privacy laws. Full details of the ruling are available in the attached decision (in Spanish).
Description: Cybercriminal Dedale Targets BarcelonaTelefónica, Leaks 1M Peruvian Customer Records BarcelonaTelefónica is probing a cyberattack by the threat actor Dedale, who claims to have accessed 22 million customer records though the breach appears limited in scope. As proof, the attacker leaked a database containing one million records, primarily affecting users in Peru. The compromised data includes multiple entries per customer (e.g., names, ID numbers, addresses), meaning the incident does not equate to 22 million unique individuals being exposed. Telefónica confirmed that Spanish customers remain unaffected, as the breach is tied to its former Peruvian subsidiary. The attack surfaced after HackManac disclosed details on X (formerly Twitter). Notably, Dedale is demanding a $1,500 ransom a fraction of typical extortion demands raising questions about the attacker’s motives. The breach coincides with Telefónica’s recent sale of its bankrupt Peruvian operations to Integra Tec International for €900,000, finalized last month. Investigations are ongoing.
Description: A cybercriminal known as Rey, part of the Hellcat ransomware operation, claims to have stolen 106GB of sensitive data from Telefónica in May 2025. The stolen data includes internal communications, purchase orders, logs, customer records, and various employee data. Rey has released a 2.6GB sample and is threatening to release the full batch unless a payment is made. Telefónica has downplayed the incident, stating that the data is old and there was no new breach.


No incidents recorded for Telefónica in 2026.
No incidents recorded for Telefónica in 2026.
No incidents recorded for Telefónica in 2026.
Telefónica cyber incidents detection timeline including parent company and subsidiaries

Telefónica is today one of the largest telecommunications companies in the world in terms of market capitalisation and number of customers. We have the best infrastructure, as well as an innovative range of digital and data services; therefore, we are favorably positioned to meet the needs of our customers and capture growth in new businesses. We are sensitive to the new challenges demanded by society today and, therefore, we provide the means to facilitate communication between people, providing them with the most secure and cutting-edge technology. Our vision is focused on technology making people's lives easier and our aim is to promote progress in that direction, so that technology can make a positive impact on the world both socially and environmentally, and, ultimately, so as to provide value and trust in an ever-changing and accelerating world. Digital life is life itself, and technology is an essential part of being human. We want to create, protect and boost connections in life so people can choose a world of unlimited possibilities. We want to be a company in which our clients, employees, suppliers, shareholders, and society in general can trust. In order to achieve this, we communicate our strategy, business model and most relevant data to our stakeholders in a clear and transparent manner, so as to show the company's ability to create value.


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Telefónica Tech UK&I announces the appointment of Martyn Bullerwell as its new CEO to drive the company's next phase of growth and innovation in the UK and...
Telefónica Tech will transfer its cybersecurity and cloud operations in Mexico, Colombia and Chile to Spain's hiberus.
Brazil's Vivo buys back cybersecurity unit from Telefónica ... Telefónica|Vivo has re-acquired parent Telefónica's Brazilian cybersecurity unit,...
Vivo buys Telefónica Tech's cybersecurity division for R$ 232 million. ... Vivo (Telefônica Brasil) announces the acquisition of Telefónica Tech's...
As every year since 1988, 30 November marks International Information Security Day – or Computer Security Day – an initiative that emerged from...
How can we strengthen digital security in an increasingly complex environment? Our position paper offers a comprehensive analysis of the...
Telefónica has agreed to sell its Peruvian arm, which recently filed for bankruptcy, to Argentina's Integra Tec International for around $1.02 million...
Cybersecurity and digital transformation are closely related, as we live in a world where digital development goes hand in hand with the...
Telefónica cuts the ribbon on Granada AI, cybersecurity hub ... Telefónica has opened another Talent and Technology Center, through which it aims...

Explore insights on cybersecurity incidents, risk posture, and Rankiteo's assessments.
The official website of Telefónica is http://www.telefonica.com.
According to Rankiteo, Telefónica’s AI-generated cybersecurity score is 568, reflecting their Very Poor security posture.
According to Rankiteo, Telefónica currently holds 0 security badges, indicating that no recognized compliance certifications are currently verified for the organization.
According to Rankiteo, Telefónica has not been affected by any supply chain cyber incidents, and no incident IDs are currently listed for the organization.
According to Rankiteo, Telefónica is not certified under SOC 2 Type 1.
According to Rankiteo, Telefónica does not hold a SOC 2 Type 2 certification.
According to Rankiteo, Telefónica is not listed as GDPR compliant.
According to Rankiteo, Telefónica does not currently maintain PCI DSS compliance.
According to Rankiteo, Telefónica is not compliant with HIPAA regulations.
According to Rankiteo,Telefónica is not certified under ISO 27001, indicating the absence of a formally recognized information security management framework.
Telefónica operates primarily in the Telecommunications industry.
Telefónica employs approximately 119,880 people worldwide.
Telefónica presently has no subsidiaries across any sectors.
Telefónica’s official LinkedIn profile has approximately 1,279,598 followers.
Telefónica is classified under the NAICS code 517, which corresponds to Telecommunications.
Yes, Telefónica has an official profile on Crunchbase, which can be accessed here: https://www.crunchbase.com/organization/telefonica.
Yes, Telefónica maintains an official LinkedIn profile, which is actively utilized for branding and talent engagement, which can be accessed here: https://www.linkedin.com/company/telefonica.
As of January 21, 2026, Rankiteo reports that Telefónica has experienced 3 cybersecurity incidents.
Telefónica has an estimated 9,783 peer or competitor companies worldwide.
Incident Types: The types of cybersecurity incidents that have occurred include Ransomware and Breach.
Total Financial Loss: The total financial loss from these incidents is estimated to be $300 thousand.
Detection and Response: The company detects and responds to cybersecurity incidents through an incident response plan activated with null, and third party assistance with null, and law enforcement notified with null, and containment measures with null, and remediation measures with null, and recovery measures with null, and communication strategy with null, and adaptive behavioral waf with null, and on demand scrubbing services with null, and network segmentation with null, and enhanced monitoring with null..
Title: Telefónica Data Breach Incident
Description: A threat actor claims to have stolen 106GB of sensitive files from Telefónica. The company asserts the files were old and stolen from a previous incident. A sample was shared with the media, with the full batch soon to follow.
Date Detected: null
Date Publicly Disclosed: null
Date Resolved: null
Type: Data Breach
Attack Vector: Internal Jira development and ticketing server
Vulnerability Exploited: null
Threat Actor: Hellcat ransomware operation, alias Rey
Motivation: Ransom
Title: Telefónica Móviles (Movistar) GDPR Violation Fine
Description: Telefónica Móviles, operating under the brand name Movistar, was fined €300,000 for breaching the EU’s GDPR data protection rules. The fine was imposed due to unlawful processing of data when an individual’s mobile phone line was changed.
Date Publicly Disclosed: 2025-12-22
Type: Data Breach
Title: Cyberattack on BarcelonaTelefónica by Dedale
Description: BarcelonaTelefónica is investigating a cyberattack carried out by cybercriminal Dedale, through which he allegedly gained illicit access to 22 million customer records. The perpetrator has leaked, as evidence, a database with one million records. The leaked database contains data from users in Peru, and the company assures that this attack would not affect customers in Spain.
Type: Data Breach
Threat Actor: Dedale
Motivation: Extortion
Common Attack Types: The most common types of attacks the company has faced is Breach.
Identification of Attack Vectors: The company identifies the attack vectors used in incidents through Internal Jira development and ticketing server.

Financial Loss: null
Data Compromised: 106GB of sensitive files, including internal communications, purchase orders, logs, customer records, and employee data
Systems Affected: Internal Jira development and ticketing server
Downtime: null
Operational Impact: null
Conversion Rate Impact: null
Revenue Loss: null
Customer Complaints: null
Brand Reputation Impact: null
Legal Liabilities: null
Identity Theft Risk: null
Payment Information Risk: null

Financial Loss: €300,000
Data Compromised: Personal data processed unlawfully during mobile phone line changes
Brand Reputation Impact: Potential reputational damage due to GDPR violation
Legal Liabilities: Regulatory fine imposed

Data Compromised: 22 million customer records accessed, 1 million records leaked
Identity Theft Risk: High
Average Financial Loss: The average financial loss per incident is $100.00 thousand.
Commonly Compromised Data Types: The types of data most commonly compromised in incidents are Internal communications, purchase orders, logs, customer records, and employee data, Personal data, Full Name, Id Number, Address and .

Entity Name: Telefónica
Entity Type: Telecommunications Company
Industry: Telecommunications
Location: Spain
Size: null
Customers Affected: null

Entity Name: Telefónica Móviles (Movistar)
Entity Type: Telecommunications
Industry: Telecommunications
Location: Spain

Entity Name: Movistar Peru (formerly Telefónica Peru)
Entity Type: Subsidiary
Industry: Telecommunications
Location: Peru
Customers Affected: Users in Peru (up to 22 million records)

Incident Response Plan Activated: null
Third Party Assistance: null
Law Enforcement Notified: null
Containment Measures: null
Remediation Measures: null
Recovery Measures: null
Communication Strategy: null
Adaptive Behavioral WAF: null
On-Demand Scrubbing Services: null
Network Segmentation: null
Enhanced Monitoring: null
Incident Response Plan: The company's incident response plan is described as null.
Third-Party Assistance: The company involves third-party assistance in incident response through null.

Type of Data Compromised: Internal communications, purchase orders, logs, customer records, and employee data
Number of Records Exposed: 380,000 files
Sensitivity of Data: Sensitive
Data Exfiltration: 106GB
Data Encryption: null
File Types Exposed: Invoices, email addresses, internal communications, purchase orders, logs, customer records, and employee data
Personally Identifiable Information: Email addresses, invoices for business partners or customers

Type of Data Compromised: Personal data
Sensitivity of Data: High (GDPR-protected data)
Personally Identifiable Information: Yes

Type of Data Compromised: Full name, Id number, Address
Number of Records Exposed: 1 million records leaked (22 million accessed)
Sensitivity of Data: High (Personally Identifiable Information)
Data Exfiltration: Yes
Personally Identifiable Information: Yes
Prevention of Data Exfiltration: The company takes the following measures to prevent data exfiltration: null.
Handling of PII Incidents: The company handles incidents involving personally identifiable information (PII) through by null.

Ransom Demanded: null
Ransom Paid: null
Ransomware Strain: Hellcat
Data Encryption: null
Data Exfiltration: 106GB
Data Recovery from Ransomware: The company recovers data encrypted by ransomware through null.

Regulations Violated: null
Fines Imposed: null
Legal Actions: null
Regulatory Notifications: null

Regulations Violated: GDPR,
Fines Imposed: €300,000
Legal Actions: Decision can be appealed within one month
Regulatory Notifications: Spanish Data Protection Agency
Ensuring Regulatory Compliance: The company ensures compliance with regulatory requirements through null, Decision can be appealed within one month.

Lessons Learned: null

Recommendations: null
Key Lessons Learned: The key lessons learned from past incidents are null.
Implemented Recommendations: The company has implemented the following recommendations to improve cybersecurity: null.

Source: HackManac
Additional Resources: Stakeholders can find additional resources on cybersecurity best practices at and Source: BleepingComputerUrl: nullDate Accessed: null, and Source: MLexDate Accessed: 2025-12-22, and Source: HackManac.

Investigation Status: null

Investigation Status: Completed (decision issued)

Investigation Status: Ongoing
Communication of Investigation Status: The company communicates the status of incident investigations to stakeholders through null.
Advisories Provided: The company provides the following advisories to stakeholders and customers following an incident: were null and null.

Entry Point: Internal Jira development and ticketing server
Reconnaissance Period: null
Backdoors Established: null
High Value Targets: null
Data Sold on Dark Web: null

Root Causes: Unlawful processing of personal data during mobile phone line changes
Post-Incident Analysis Process: The company's process for conducting post-incident analysis is described as null, null.
Corrective Actions Taken: The company has taken the following corrective actions based on post-incident analysis: null.
Ransom Payment History: The company has Paid ransoms in the past.
Last Ransom Demanded: The amount of the last ransom demanded was null.
Last Attacking Group: The attacking group in the last incident were an Hellcat ransomware operation, alias Rey and Dedale.
Most Recent Incident Detected: The most recent incident detected was on null.
Most Recent Incident Publicly Disclosed: The most recent incident publicly disclosed was on 2025-12-22.
Most Recent Incident Resolved: The most recent incident resolved was on null.
Most Significant Data Compromised: The most significant data compromised in an incident were 106GB of sensitive files, including internal communications, purchase orders, logs, customer records, and employee data, Personal data processed unlawfully during mobile phone line changes, 22 million customer records accessed and 1 million records leaked.
Third-Party Assistance in Most Recent Incident: The third-party assistance involved in the most recent incident was null.
Containment Measures in Most Recent Incident: The containment measures taken in the most recent incident was null.
Most Sensitive Data Compromised: The most sensitive data compromised in a breach were 22 million customer records accessed, 1 million records leaked, Personal data processed unlawfully during mobile phone line changes, 106GB of sensitive files, including internal communications, purchase orders, logs, customer records and and employee data.
Number of Records Exposed in Most Significant Breach: The number of records exposed in the most significant breach was 23.4M.
Highest Ransom Paid: The highest ransom paid in a ransomware incident was null.
Highest Fine Imposed: The highest fine imposed for a regulatory violation was null, €300,000.
Most Significant Legal Action: The most significant legal action taken for a regulatory violation was null, Decision can be appealed within one month.
Most Significant Lesson Learned: The most significant lesson learned from past incidents was null.
Most Significant Recommendation Implemented: The most significant recommendation implemented to improve cybersecurity was null.
Most Recent Source: The most recent source of information about an incident are HackManac, MLex and BleepingComputer.
Most Recent URL for Additional Resources: The most recent URL for additional resources on cybersecurity best practices is null .
Current Status of Most Recent Investigation: The current status of the most recent investigation is null.
Most Recent Stakeholder Advisory: The most recent stakeholder advisory issued was null, .
Most Recent Customer Advisory: The most recent customer advisory issued was an null.
Most Recent Entry Point: The most recent entry point used by an initial access broker was an Internal Jira development and ticketing server.
Most Recent Reconnaissance Period: The most recent reconnaissance period for an incident was null.
Most Significant Root Cause: The most significant root cause identified in post-incident analysis was null, Unlawful processing of personal data during mobile phone line changes.
Most Significant Corrective Action: The most significant corrective action taken based on post-incident analysis was null.
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SummaryA command injection vulnerability (CWE-78) has been found to exist in the `wrangler pages deploy` command. The issue occurs because the `--commit-hash` parameter is passed directly to a shell command without proper validation or sanitization, allowing an attacker with control of `--commit-hash` to execute arbitrary commands on the system running Wrangler. Root causeThe commitHash variable, derived from user input via the --commit-hash CLI argument, is interpolated directly into a shell command using template literals (e.g., execSync(`git show -s --format=%B ${commitHash}`)). Shell metacharacters are interpreted by the shell, enabling command execution. ImpactThis vulnerability is generally hard to exploit, as it requires --commit-hash to be attacker controlled. The vulnerability primarily affects CI/CD environments where `wrangler pages deploy` is used in automated pipelines and the --commit-hash parameter is populated from external, potentially untrusted sources. An attacker could exploit this to: * Run any shell command. * Exfiltrate environment variables. * Compromise the CI runner to install backdoors or modify build artifacts. Credits Disclosed responsibly by kny4hacker. Mitigation * Wrangler v4 users are requested to upgrade to Wrangler v4.59.1 or higher. * Wrangler v3 users are requested to upgrade to Wrangler v3.114.17 or higher. * Users on Wrangler v2 (EOL) should upgrade to a supported major version.
Vulnerability in the Oracle VM VirtualBox product of Oracle Virtualization (component: Core). Supported versions that are affected are 7.1.14 and 7.2.4. Easily exploitable vulnerability allows high privileged attacker with logon to the infrastructure where Oracle VM VirtualBox executes to compromise Oracle VM VirtualBox. While the vulnerability is in Oracle VM VirtualBox, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in takeover of Oracle VM VirtualBox. CVSS 3.1 Base Score 8.2 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H).
Vulnerability in the Oracle VM VirtualBox product of Oracle Virtualization (component: Core). Supported versions that are affected are 7.1.14 and 7.2.4. Easily exploitable vulnerability allows high privileged attacker with logon to the infrastructure where Oracle VM VirtualBox executes to compromise Oracle VM VirtualBox. While the vulnerability is in Oracle VM VirtualBox, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in unauthorized creation, deletion or modification access to critical data or all Oracle VM VirtualBox accessible data as well as unauthorized access to critical data or complete access to all Oracle VM VirtualBox accessible data and unauthorized ability to cause a partial denial of service (partial DOS) of Oracle VM VirtualBox. CVSS 3.1 Base Score 8.1 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:L).
Vulnerability in the Oracle VM VirtualBox product of Oracle Virtualization (component: Core). Supported versions that are affected are 7.1.14 and 7.2.4. Easily exploitable vulnerability allows high privileged attacker with logon to the infrastructure where Oracle VM VirtualBox executes to compromise Oracle VM VirtualBox. While the vulnerability is in Oracle VM VirtualBox, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in takeover of Oracle VM VirtualBox. CVSS 3.1 Base Score 8.2 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H).
Vulnerability in the Oracle VM VirtualBox product of Oracle Virtualization (component: Core). Supported versions that are affected are 7.1.14 and 7.2.4. Easily exploitable vulnerability allows high privileged attacker with logon to the infrastructure where Oracle VM VirtualBox executes to compromise Oracle VM VirtualBox. While the vulnerability is in Oracle VM VirtualBox, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in takeover of Oracle VM VirtualBox. CVSS 3.1 Base Score 8.2 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H).

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