Київстар
Company Details
Linkedin ID:
kyivstar
Website:
Employees number:
3,227
Number of followers:
38,541
NAICS:
517
Industry Type:
Homepage:
kyivstar.ua
IP Addresses:
197
Company ID:
КИЇ_2703728
Scan Status:
Completed
Київстар Company CyberSecurity Posture
kyivstar.ua
Київстар – найбільший український оператор електронних комунікацій, що станом на березень 2023 року обслуговував 24,3 млн абонентів мобільного зв’язку та понад 1,1 млн абонентів «Домашнього інтернету». Компанія надає послуги з використанням широкого спектра мобільних і фіксованих технологій, у тому числі 4G, Big Data, Cloud solutions, сервіси для кіберзахисту, цифрове ТБ та ін. Київстар допомагає абонентам, суспільству та країні долати складнощі воєнного часу. На липень 2023 року компанія надала гуманітарної допомоги країні, абонентам, ЗСУ на суму майже 1,1 млрд грн, а також інвестувала 6,7 млрд грн у відбудову та розвиток телеком мережі. Акціонер Київстар – міжнародна Група VEON. Акції Групи знаходяться на фондових біржах NASDAQ (Нью-Йорк) та Euronext (Амстердам). Київстар 25 років працює в Україні та визнаний найбільшим платником податків на телеком-ринку, кращим роботодавцем і соціально відповідальною компанією.
Київстар A.I CyberSecurity Scoring
Київстар Risk Score (AI oriented)Between 750 and 799
Київстар
Updated:
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Київстар Global Score (TPRM)XXXX
Київстар
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- Vulnerabilities
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Київстар Company CyberSecurity News & History
Past Incidents
1
Attack Types
1
Київстар
Cyber Attack
Rankiteo Explanation
Attack with significant impact with customers data leaks
Description: The primary telecom operator in Ukraine, Kyivstar, reports that it has been the victim of a "powerful hacker attack." Customers were left without internet or mobile service as a result of the attack, which also caused the air raid sirens in the northeastern city of Sumy to malfunction. Over 25 million people use Kyivstar's mobile service, while one million people use its home internet. The company used its social media channels to notify its clients about the outage due to the disruption to its website.
Київстар Company Scoring based on AI Models
Cyber Incidents Likelihood 3 - 6 - 9 months
A.I Risk Score Likelihood 3 - 6 - 9 months
Underwriter Stats for Київстар
Incidents vs Telecommunications Industry Average (This Year)
No incidents recorded for Київстар in 2025.
Incidents vs All-Companies Average (This Year)
No incidents recorded for Київстар in 2025.
Incident Types Київстар vs Telecommunications Industry Avg (This Year)
No incidents recorded for Київстар in 2025.
Incident History — Київстар (X = Date, Y = Severity)
Київстар cyber incidents detection timeline including parent company and subsidiaries
Київстар Company Subsidiaries
Київстар – найбільший український оператор електронних комунікацій, що станом на березень 2023 року обслуговував 24,3 млн абонентів мобільного зв’язку та понад 1,1 млн абонентів «Домашнього інтернету». Компанія надає послуги з використанням широкого спектра мобільних і фіксованих технологій, у тому числі 4G, Big Data, Cloud solutions, сервіси для кіберзахисту, цифрове ТБ та ін. Київстар допомагає абонентам, суспільству та країні долати складнощі воєнного часу. На липень 2023 року компанія надала гуманітарної допомоги країні, абонентам, ЗСУ на суму майже 1,1 млрд грн, а також інвестувала 6,7 млрд грн у відбудову та розвиток телеком мережі. Акціонер Київстар – міжнародна Група VEON. Акції Групи знаходяться на фондових біржах NASDAQ (Нью-Йорк) та Euronext (Амстердам). Київстар 25 років працює в Україні та визнаний найбільшим платником податків на телеком-ринку, кращим роботодавцем і соціально відповідальною компанією.
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Київстар CyberSecurity News
January 05, 2024 08:00 AM
Exclusive: Russian hackers were inside Ukraine telecoms giant for months
Russian hackers were inside Ukrainian telecoms giant Kyivstar's system from at least May last year in a cyberattack that should serve as a...
Frequently Asked Questions
Explore insights on cybersecurity incidents, risk posture, and Rankiteo's assessments.
Київстар CyberSecurity History Information
Official Website of Київстар
The official website of Київстар is http://kyivstar.ua.
Київстар’s AI-Generated Cybersecurity Score
According to Rankiteo, Київстар’s AI-generated cybersecurity score is 755, reflecting their Fair security posture.
How many security badges does Київстар’ have ?
According to Rankiteo, Київстар currently holds 0 security badges, indicating that no recognized compliance certifications are currently verified for the organization.
Does Київстар have SOC 2 Type 1 certification ?
According to Rankiteo, Київстар is not certified under SOC 2 Type 1.
Does Київстар have SOC 2 Type 2 certification ?
According to Rankiteo, Київстар does not hold a SOC 2 Type 2 certification.
Does Київстар comply with GDPR ?
According to Rankiteo, Київстар is not listed as GDPR compliant.
Does Київстар have PCI DSS certification ?
According to Rankiteo, Київстар does not currently maintain PCI DSS compliance.
Does Київстар comply with HIPAA ?
According to Rankiteo, Київстар is not compliant with HIPAA regulations.
Does Київстар have ISO 27001 certification ?
According to Rankiteo,Київстар is not certified under ISO 27001, indicating the absence of a formally recognized information security management framework.
Industry Classification of Київстар
Київстар operates primarily in the Telecommunications industry.
Number of Employees at Київстар
Київстар employs approximately 3,227 people worldwide.
Subsidiaries Owned by Київстар
Київстар presently has no subsidiaries across any sectors.
Київстар’s LinkedIn Followers
Київстар’s official LinkedIn profile has approximately 38,541 followers.
NAICS Classification of Київстар
Київстар is classified under the NAICS code 517, which corresponds to Telecommunications.
Київстар’s Presence on Crunchbase
No, Київстар does not have a profile on Crunchbase.
Київстар’s Presence on LinkedIn
Yes, Київстар maintains an official LinkedIn profile, which is actively utilized for branding and talent engagement, which can be accessed here: https://www.linkedin.com/company/kyivstar.
Cybersecurity Incidents Involving Київстар
As of November 27, 2025, Rankiteo reports that Київстар has experienced 1 cybersecurity incidents.
Number of Peer and Competitor Companies
Київстар has an estimated 9,533 peer or competitor companies worldwide.
What types of cybersecurity incidents have occurred at Київстар ?
Incident Types: The types of cybersecurity incidents that have occurred include Cyber Attack.
How does Київстар detect and respond to cybersecurity incidents ?
Detection and Response: The company detects and responds to cybersecurity incidents through an communication strategy with social media notifications..
Incident Details
Can you provide details on each incident ?
Title: Powerful Hacker Attack on Kyivstar
Description: Kyivstar, the primary telecom operator in Ukraine, experienced a hacker attack that disrupted mobile and internet services for millions of customers and caused malfunctions in air raid sirens in Sumy.
Type: Cyber Attack
What are the most common types of attacks the company has faced ?
Common Attack Types: The most common types of attacks the company has faced is Cyber Attack.
Impact of the Incidents
What was the impact of each incident ?
Incident : Cyber Attack 9415124
Systems Affected: Mobile ServiceInternet ServiceAir Raid Sirens
Operational Impact: Service OutageSiren Malfunction
Which entities were affected by each incident ?
Incident : Cyber Attack 9415124
Entity Name: Kyivstar
Entity Type: Telecom Operator
Industry: Telecommunications
Location: Ukraine
Size: Large
Customers Affected: 25 million mobile users, 1 million home internet users
Response to the Incidents
What measures were taken in response to each incident ?
Incident : Cyber Attack 9415124
Communication Strategy: Social Media Notifications
Investigation Status
How does the company communicate the status of incident investigations to stakeholders ?
Communication of Investigation Status: The company communicates the status of incident investigations to stakeholders through Social Media Notifications.
Additional Questions
Impact of the Incidents
What was the most significant system affected in an incident ?
Most Significant System Affected: The most significant system affected in an incident was Mobile ServiceInternet ServiceAir Raid Sirens.
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Latest Global CVEs (Not Company-Specific)
Description
Angular is a development platform for building mobile and desktop web applications using TypeScript/JavaScript and other languages. Prior to versions 19.2.16, 20.3.14, and 21.0.1, there is a XSRF token leakage via protocol-relative URLs in angular HTTP clients. The vulnerability is a Credential Leak by App Logic that leads to the unauthorized disclosure of the Cross-Site Request Forgery (XSRF) token to an attacker-controlled domain. Angular's HttpClient has a built-in XSRF protection mechanism that works by checking if a request URL starts with a protocol (http:// or https://) to determine if it is cross-origin. If the URL starts with protocol-relative URL (//), it is incorrectly treated as a same-origin request, and the XSRF token is automatically added to the X-XSRF-TOKEN header. This issue has been patched in versions 19.2.16, 20.3.14, and 21.0.1. A workaround for this issue involves avoiding using protocol-relative URLs (URLs starting with //) in HttpClient requests. All backend communication URLs should be hardcoded as relative paths (starting with a single /) or fully qualified, trusted absolute URLs.
Risk Information
cvss4
Base: 7.7
Severity: LOW
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/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
References
- https://github.com/angular/angular/commit/0276479e7d0e280e0f8d26fa567d3b7aa97a516f
- https://github.com/angular/angular/commit/05fe6686a97fa0bcd3cf157805b3612033f975bc
- https://github.com/angular/angular/commit/3240d856d942727372a705252f7c8c115394a41e
- https://github.com/angular/angular/releases/tag/19.2.16
- https://github.com/angular/angular/releases/tag/20.3.14
- https://github.com/angular/angular/releases/tag/21.0.1
- https://github.com/angular/angular/security/advisories/GHSA-58c5-g7wp-6w37
Description
Forge (also called `node-forge`) is a native implementation of Transport Layer Security in JavaScript. An Uncontrolled Recursion vulnerability in node-forge versions 1.3.1 and below enables remote, unauthenticated attackers to craft deep ASN.1 structures that trigger unbounded recursive parsing. This leads to a Denial-of-Service (DoS) via stack exhaustion when parsing untrusted DER inputs. This issue has been patched in version 1.3.2.
Risk Information
cvss4
Base: 8.7
Severity: LOW
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/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
Forge (also called `node-forge`) is a native implementation of Transport Layer Security in JavaScript. An Integer Overflow vulnerability in node-forge versions 1.3.1 and below enables remote, unauthenticated attackers to craft ASN.1 structures containing OIDs with oversized arcs. These arcs may be decoded as smaller, trusted OIDs due to 32-bit bitwise truncation, enabling the bypass of downstream OID-based security decisions. This issue has been patched in version 1.3.2.
Risk Information
cvss4
Base: 6.3
Severity: LOW
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/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
Suricata is a network IDS, IPS and NSM engine developed by the OISF (Open Information Security Foundation) and the Suricata community. Prior to versions 7.0.13 and 8.0.2, working with large buffers in Lua scripts can lead to a stack overflow. Users of Lua rules and output scripts may be affected when working with large buffers. This includes a rule passing a large buffer to a Lua script. This issue has been patched in versions 7.0.13 and 8.0.2. A workaround for this issue involves disabling Lua rules and output scripts, or making sure limits, such as stream.depth.reassembly and HTTP response body limits (response-body-limit), are set to less than half the stack size.
Risk Information
cvss3
Base: 7.5
Severity: LOW
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Description
Suricata is a network IDS, IPS and NSM engine developed by the OISF (Open Information Security Foundation) and the Suricata community. In versions from 8.0.0 to before 8.0.2, a NULL dereference can occur when the entropy keyword is used in conjunction with base64_data. This issue has been patched in version 8.0.2. A workaround involves disabling rules that use entropy in conjunction with base64_data.
Risk Information
cvss3
Base: 7.5
Severity: LOW
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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RapidWhat Do We Measure ?
Incident
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Digital Assets
Every week, Rankiteo analyzes billions of signals to give organizations a sharper, faster view of emerging risks. With deeper, more actionable intelligence at their fingertips, security teams can outpace threat actors, respond instantly to Zero-Day attacks, and dramatically shrink their risk exposure window.
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Network Security
Identify exposed access points, detect misconfigured SSL certificates, and uncover vulnerabilities across the network infrastructure.
SBOM (Software Bill of Materials)
Gain visibility into the software components used within an organization to detect vulnerabilities, manage risk, and ensure supply chain security.
CMDB (Configuration Management Database)
Monitor and manage all IT assets and their configurations to ensure accurate, real-time visibility across the company's technology environment.
Threat Intelligence
Leverage real-time insights on active threats, malware campaigns, and emerging vulnerabilities to proactively defend against evolving cyberattacks.
Rankiteo is a unified scoring and risk platform that analyzes billions of signals weekly to help organizations gain faster, more actionable insights into emerging threats. Empowering teams to outpace adversaries and reduce exposure.
