Comparison Overview

A1 Telekom Austria Group

VS

Three UK

A1 Telekom Austria Group

Last Update: 2026-01-17
Between 750 and 799

WE ARE EMPOWERING DIGITAL LIFE We don't know how the world will look like in 2050, but we know that A1 Telekom Austria Group is geared up for current and future demands. We are a leading provider of digital services and communications solutions in Central and Eastern Europe, offering a state-of-the art network infrastructure as well as empowering digitalization. 19.000 of our employees and modern broadband infrastructure make digital business and lifestyle possible as well as enable more than 24 mio users to connect everywhere anytime. Our purpose is to Empower Digital Life in areas of communications, payment, entertainment services and integrated business solutions. We do this together with our operating companies in 7 European countries: Austria, Bulgaria, Croatia, Slovenia, Belarus, Republic of Serbia and Republic of North Macedonia. Headquartered in Vienna and listed on the Vienna Stock Exchange, the A1 Telekom Austria Group is an European unit of América Móvil, one of the world´s largest wireless services providers. You can follow us also here: https://twitter.com/TA_Group Find out more about us as employer on https://jobs.a1.com/

NAICS: 517
NAICS Definition: Telecommunications
Employees: 11,462
Subsidiaries: 10
12-month incidents
0
Known data breaches
2
Attack type number
1

Three UK

Great Brighams Mead, Reading, RG1 8DJ, GB
Last Update: 2026-01-12
Between 700 and 749

Three UK is a big network for the little or life-changing connections that make life richer. Our brand embodies the strength of our network and how we can provide better connectivity every day for every customer. Three UK was founded in 2003 to challenge the mobile industry, and now covers 99% of the UK outdoor population with its combined 3G and 4G network and carries 28% of mobile data traffic in the country (Enders Analysis). Three has more spectrum exclusively dedicated to 5G than any other UK mobile network, meaning our customers will benefit from an outstanding experience when using the next generation of mobile technology. Three UK is the official sponsor of Chelsea FC men’s and women’s teams as well as Channel 4’s Gogglebox. Three is also a proud partner of Samaritans, where we will use the strength of our network and technology to connect 1 million people to emotional support.

NAICS: 517
NAICS Definition: Telecommunications
Employees: 5,601
Subsidiaries: 2
12-month incidents
0
Known data breaches
0
Attack type number
1

Compliance Badges Comparison

Security & Compliance Standards Overview

https://images.rankiteo.com/companyimages/a1-telekom-austria-group.jpeg
A1 Telekom Austria Group
ISO 27001
ISO 27001 certification not verified
Not verified
SOC2 Type 1
SOC2 Type 1 certification not verified
Not verified
SOC2 Type 2
SOC2 Type 2 certification not verified
Not verified
GDPR
GDPR certification not verified
Not verified
PCI DSS
PCI DSS certification not verified
Not verified
HIPAA
HIPAA certification not verified
Not verified
https://images.rankiteo.com/companyimages/threeuk.jpeg
Three UK
ISO 27001
ISO 27001 certification not verified
Not verified
SOC2 Type 1
SOC2 Type 1 certification not verified
Not verified
SOC2 Type 2
SOC2 Type 2 certification not verified
Not verified
GDPR
GDPR certification not verified
Not verified
PCI DSS
PCI DSS certification not verified
Not verified
HIPAA
HIPAA certification not verified
Not verified
Compliance Summary
A1 Telekom Austria Group
100%
Compliance Rate
0/4 Standards Verified
Three UK
0%
Compliance Rate
0/4 Standards Verified

Benchmark & Cyber Underwriting Signals

Incidents vs Telecommunications Industry Average (This Year)

No incidents recorded for A1 Telekom Austria Group in 2026.

Incidents vs Telecommunications Industry Average (This Year)

No incidents recorded for Three UK in 2026.

Incident History — A1 Telekom Austria Group (X = Date, Y = Severity)

A1 Telekom Austria Group cyber incidents detection timeline including parent company and subsidiaries

Incident History — Three UK (X = Date, Y = Severity)

Three UK cyber incidents detection timeline including parent company and subsidiaries

Notable Incidents

Last 3 Security & Risk Events by Company

https://images.rankiteo.com/companyimages/a1-telekom-austria-group.jpeg
A1 Telekom Austria Group
Incidents

Date Detected: 02/2022
Type:Breach
Blog: Blog

Date Detected: 11/2019
Type:Breach
Blog: Blog
https://images.rankiteo.com/companyimages/threeuk.jpeg
Three UK
Incidents

Date Detected: 11/2019
Type:Data Leak
Attack Vector: Website Vulnerability
Blog: Blog

Date Detected: 03/2017
Type:Data Leak
Attack Vector: Technological Error
Blog: Blog

FAQ

A1 Telekom Austria Group company demonstrates a stronger AI Cybersecurity Score compared to Three UK company, reflecting its advanced cybersecurity posture governance and monitoring frameworks.

A1 Telekom Austria Group and Three UK have experienced a similar number of publicly disclosed cyber incidents.

In the current year, Three UK company and A1 Telekom Austria Group company have not reported any cyber incidents.

Neither Three UK company nor A1 Telekom Austria Group company has reported experiencing a ransomware attack publicly.

A1 Telekom Austria Group company has disclosed at least one data breach, while the other Three UK company has not reported such incidents publicly.

Neither Three UK company nor A1 Telekom Austria Group company has reported experiencing targeted cyberattacks publicly.

Neither A1 Telekom Austria Group company nor Three UK company has reported experiencing or disclosing vulnerabilities publicly.

Neither A1 Telekom Austria Group nor Three UK holds any compliance certifications.

Neither company holds any compliance certifications.

A1 Telekom Austria Group company has more subsidiaries worldwide compared to Three UK company.

A1 Telekom Austria Group company employs more people globally than Three UK company, reflecting its scale as a Telecommunications.

Neither A1 Telekom Austria Group nor Three UK holds SOC 2 Type 1 certification.

Neither A1 Telekom Austria Group nor Three UK holds SOC 2 Type 2 certification.

Neither A1 Telekom Austria Group nor Three UK holds ISO 27001 certification.

Neither A1 Telekom Austria Group nor Three UK holds PCI DSS certification.

Neither A1 Telekom Austria Group nor Three UK holds HIPAA certification.

Neither A1 Telekom Austria Group nor Three UK holds GDPR certification.

Latest Global CVEs (Not Company-Specific)

Description

Gradle is a build automation tool, and its native-platform tool provides Java bindings for native APIs. When resolving dependencies in versions before 9.3.0, some exceptions were not treated as fatal errors and would not cause a repository to be disabled. If a build encountered one of these exceptions, Gradle would continue to the next repository in the list and potentially resolve dependencies from a different repository. An exception like NoHttpResponseException can indicate transient errors. If the errors persist after a maximum number of retries, Gradle would continue to the next repository. This behavior could allow an attacker to disrupt the service of a repository and leverage another repository to serve malicious artifacts. This attack requires the attacker to have control over a repository after the disrupted repository. Gradle has introduced a change in behavior in Gradle 9.3.0 to stop searching other repositories when encountering these errors.

Risk Information
cvss4
Base: 8.6
Severity: HIGH
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Description

Gradle is a build automation tool, and its native-platform tool provides Java bindings for native APIs. When resolving dependencies in versions before 9.3.0, some exceptions were not treated as fatal errors and would not cause a repository to be disabled. If a build encountered one of these exceptions, Gradle would continue to the next repository in the list and potentially resolve dependencies from a different repository. If a Gradle build used an unresolvable host name, Gradle would continue to work as long as all dependencies could be resolved from another repository. An unresolvable host name could be caused by allowing a repository's domain name registration to lapse or typo-ing the real domain name. This behavior could allow an attacker to register a service under the host name used by the build and serve malicious artifacts. The attack requires the repository to be listed before others in the build configuration. Gradle has introduced a change in behavior in Gradle 9.3.0 to stop searching other repositories when encountering these errors.

Risk Information
cvss4
Base: 8.6
Severity: HIGH
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Description

node-tar is a Tar for Node.js. The node-tar library (<= 7.5.2) fails to sanitize the linkpath of Link (hardlink) and SymbolicLink entries when preservePaths is false (the default secure behavior). This allows malicious archives to bypass the extraction root restriction, leading to Arbitrary File Overwrite via hardlinks and Symlink Poisoning via absolute symlink targets. This vulnerability is fixed in 7.5.3.

Risk Information
cvss4
Base: 8.2
Severity: LOW
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:L/VA:N/SC:H/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Description

Microsoft Edge Elevation Service exposes a privileged COM interface that inadequately validates the privileges of the calling process. A standard (non‑administrator) local user can invoke the IElevatorEdge interface method LaunchUpdateCmdElevatedAndWait, causing the service to execute privileged update commands as LocalSystem. This allows a non‑administrator to enable or disable Windows Virtualization‑Based Security (VBS) by modifying protected system registry keys under HKLM\SYSTEM\CurrentControlSet\Control\DeviceGuard. Disabling VBS weakens critical platform protections such as Credential Guard, Hypervisor‑protected Code Integrity (HVCI), and the Secure Kernel, resulting in a security feature bypass.

Risk Information
cvss3
Base: 5.1
Severity: LOW
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Description

Improper authorization in Microsoft Power Apps allows an authorized attacker to execute code over a network.

Risk Information
cvss3
Base: 8.0
Severity: LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H