What is the official website of Київстар ?

The official website of Київстар is http://kyivstar.ua.

What is Київстар's cybersecurity risk score?

Київстар has an AI-generated cybersecurity risk score of 756 out of 1000, indicating a Fair security posture according to Rankiteo's assessment.

How many security incidents has Київстар experienced?

According to Rankiteo, Київстар currently holds 0 security badges, indicating that no recognized compliance certifications are currently verified for the organization.

Has Київстар been affected by any supply chain cyber incidents ?

According to Rankiteo, Київстар has not been affected by any supply chain cyber incidents, and no incident IDs are currently listed 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.

Which industry does Київстар operate in ?

Київстар operates primarily in the Telecommunications industry.

How many employees does Київстар have ?

Київстар employs approximately 3,227 people worldwide.

Does Київстар own any subsidiaries ?

Київстар presently has no subsidiaries across any sectors.

How many LinkedIn followers does Київстар have ?

Київстар's official LinkedIn profile has approximately 38,541 followers.

What is the NAICS classification code for Київстар ?

Київстар is classified under the NAICS code 517, which corresponds to Telecommunications.

Does Київстар have a Crunchbase profile ?

No, Київстар does not have a profile on Crunchbase.

Does Київстар have a LinkedIn profile ?

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.

How many cybersecurity incidents has Київстар experienced ?

As of July 18, 2026, Rankiteo reports that Київстар has experienced 1 cybersecurity incidents.

How many peer or competitor companies does Київстар have ?

Київстар has an estimated 10,244 peer or competitor companies worldwide.

What types of cybersecurity incidents has Київстар faced ?

Incident Types: The types of cybersecurity incidents that have occurred include Cyber Attack.

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Київстар

Boost Score +25 with badge (5 left)

756

/1000

Fair

781

/1000

Fair

Київстар Vendor Cyber Rating & Cyber Score

kyivstar.ua

Add Your Compliance Badge

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

Київстар A.I CyberSecurity Scoring

Scoring History

Київстар

Київстар CyberSecurity News & History

Past Incidents

Attack Types

Entity

Type

Severity

Impact

Seen

Blog Details

Supply Chain Source

Incident Details

View

Київстар

Cyber Attack

12/2023

9415124

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A.I.

Київстар Company Scoring based on AI Models

Cyber Incidents Likelihood 3 - 6 - 9 months

Actual

Prediction

Incident Predictions locked

Access Monitoring Plan

A.I Risk Score Likelihood 3 - 6 - 9 months

Actual

Prediction A

Prediction B

Prediction C

Prediction D

A.I. Risk Score Predictions locked

Access Monitoring Plan

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Underwriter Stats for Київстар

Incidents vs Telecommunications Industry Avg (This Year)

No incidents recorded for Київстар in 2026.

Incidents vs All-Companies Average (This Year)

No incidents recorded for Київстар in 2026.

Incident Types Київстар vs Telecommunications Industry Avg (This Year)

No incidents recorded for Київстар in 2026.

Incident History - Київстар (X = Date, Y = Severity)

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SUBSIDIARY

Київстар Subsidiaries

Київстар

Telecommunications

Website: http://kyivstar.ua

Company Size: 3,227

VEONTelecommunications

banglalinkTelecommunications

Beeline KyrgyzstanTelecommunications

JazzTelecommunications

Beeline KazakhstanTelecommunications

Beeline BusinessTelecommunications

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NEWS

Київстар CyberSecurity News

Latest updates, reports, and threat intel affecting the global network.

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...

Read Article

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CVE

Latest

Global CVEs (Not Company-Specific)

CVE-2026-44453

SUMMARY

h2o is an HTTP server with support for HTTP/1.x, HTTP/2 and HTTP/3. Prior to commit 6b5370d, h2o is vulnerable to a Denial of Service attack when calling alloca under certain conditions. When serving static files, h2o builds the file path on stack, by calling alloca. The maximum size of the memory allocated using alloca can be as huge as ~600KB, which exceeds the default pthread stack size used by musl libc (128KB). If the amount of memory allocated by alloca exceeds the stack size, the h2o server crashes with a segmentation fault, while it tries to touch the guard page. This issue has been fixed by commit 6b5370d.

Published

Date2026-07-16

Updated

Date2026-07-16

RISK INFORMATION (Score: 7.5)

cvss3

Base Score: 7.5

Complexity: LOW

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Impact Score

3.6

Exploitability

3.9

REFERENCES

CVE-2026-44452

SUMMARY

h2o is an HTTP server with support for HTTP/1.x, HTTP/2 and HTTP/3. Prior to commit 8dc37cb, when h2o receives a ClientHello message over TLS or QUIC and it contains a zero-length SNI extension, the h2o server runs over the zero-length hostname while trying to copy the hostname, assuming that it is NULL-terminated. This is a potential denial-of-service attack vector in sense that it might trigger segmentation violation. This issue has been fixed by commit 8dc37cb.

Published

Date2026-07-16

Updated

Date2026-07-16

RISK INFORMATION (Score: 5.9)

cvss3

Base Score: 5.9

Complexity: HIGH

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Impact Score

3.6

Exploitability

2.2

REFERENCES

CVE-2026-44436

SUMMARY

Quicly is an IETF QUIC protocol implementation intended primarily for use within the H2O HTTP server. Prior to commit 8b178e6, Quicly is vulnerable to a Denial of Service attack through connection state corruption. In QUIC Invariants, the maximum length of a Connection ID is 255 bytes, while QUIC version 1 further restricts the maximum to 20 bytes. Quicly implements QUIC version 1 and therefore its CID buffers are limited to 20 bytes. However, to be able to respond to unknown versions of QUIC, its packet decoder accepts Connection IDs of up to 255 bytes. As its CID buffers are merely 20 bytes long, Quicly must reject QUIC version 1 packets with Connection IDs longer than that. The command line tool bundled with Quicly has had that check, however the library itself lacked such enforcement. As a consequence, when used by applications that lack their own enforcement, the connection state becoming inconsistent to buffer overrun. Fortunately, the overflow stops within the allocated chunk of memory, but nevertheless, the bug leads to assertion failures. This issue has been fixed by commit 8b178e6.

Published

Date2026-07-16

Updated

Date2026-07-16

RISK INFORMATION (Score: 7.5)

cvss3

Base Score: 7.5

Complexity: LOW

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Impact Score

3.6

Exploitability

3.9

REFERENCES

CVE-2026-44435

SUMMARY

Quicly is an IETF QUIC protocol implementation intended primarily for use within the H2O HTTP server. Prior to commit 937d0e9, an assertion failure is raised when the total number of valid handshake messages received over a CRYPTO stream of a single packet number space exceeds 32KB, causing a Denial of Service. This issue has been fixed by commit 937d0e9.

Published

Date2026-07-16

Updated

Date2026-07-16

RISK INFORMATION (Score: 7.5)

cvss3

Base Score: 7.5

Complexity: LOW

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Impact Score

3.6

Exploitability

3.9

REFERENCES

CVE-2026-44434

SUMMARY

Quicly is an IETF QUIC protocol implementation intended primarily for use within the H2O HTTP server. Prior to commit dccf5d4, Quicly was vulnerable to stateless reset injection through lack of packet entry validation. The QUIC protocol is designed to withstand packet injection attacks, once the handshake is complete. Only packets that carry some secret patterns are considered as stateless resets. Quicly allows the peer to share up to 4 such patterns per connection. However, until now, it failed to determine which of the 4 slots that it uses to retain the secret patterns contains a valid entry. As the slots are zero-initialized, the failure meant that, unless the peer advertised 4 of such patterns, an all-zero pattern was treated as a stateless reset.In effect, this allowed an on-path attacker to reset QUIC connections governed by Quicly. This issue has been fixed by commit dccf5d4.

Published

Date2026-07-16

Updated

Date2026-07-16

RISK INFORMATION (Score: 5.3)

cvss3

Base Score: 5.3

Complexity: LOW

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Impact Score

1.4

Exploitability

3.9

REFERENCES

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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.

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