What is the official website of Circle K ?

The official website of Circle K is http://www.circlek.com/.

What is Circle K's cybersecurity risk score?

Circle K has an AI-generated cybersecurity risk score of 765 out of 1000, indicating a Fair security posture according to Rankiteo's assessment.

How many security incidents has Circle K experienced?

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

Has Circle K been affected by any supply chain cyber incidents ?

According to Rankiteo, Circle K has not been affected by any supply chain cyber incidents, and no incident IDs are currently listed for the organization.

Does Circle K have SOC 2 Type 1 certification ?

According to Rankiteo, Circle K is not certified under SOC 2 Type 1.

Does Circle K have SOC 2 Type 2 certification ?

According to Rankiteo, Circle K does not hold a SOC 2 Type 2 certification.

Does Circle K comply with GDPR ?

According to Rankiteo, Circle K is not listed as GDPR compliant.

Does Circle K have PCI DSS certification ?

According to Rankiteo, Circle K does not currently maintain PCI DSS compliance.

Does Circle K comply with HIPAA ?

According to Rankiteo, Circle K is not compliant with HIPAA regulations.

Does Circle K have ISO 27001 certification ?

According to Rankiteo,Circle K is not certified under ISO 27001, indicating the absence of a formally recognized information security management framework.

Which industry does Circle K operate in ?

Circle K operates primarily in the Retail industry.

How many employees does Circle K have ?

Circle K employs approximately 46,315 people worldwide.

Does Circle K own any subsidiaries ?

Circle K presently has no subsidiaries across any sectors.

How many LinkedIn followers does Circle K have ?

Circle K's official LinkedIn profile has approximately 316,618 followers.

What is the NAICS classification code for Circle K ?

Circle K is classified under the NAICS code 43, which corresponds to Retail Trade.

Does Circle K have a Crunchbase profile ?

No, Circle K does not have a profile on Crunchbase.

Does Circle K have a LinkedIn profile ?

Yes, Circle K maintains an official LinkedIn profile, which is actively utilized for branding and talent engagement, which can be accessed here: https://www.linkedin.com/company/circle-k.

How many cybersecurity incidents has Circle K experienced ?

As of July 17, 2026, Rankiteo reports that Circle K has experienced 1 cybersecurity incidents.

How many peer or competitor companies does Circle K have ?

Circle K has an estimated 15,913 peer or competitor companies worldwide.

What types of cybersecurity incidents has Circle K faced ?

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

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Circle K

Boost Score +25 with badge (5 left)

765

/1000

Fair

790

/1000

Fair

Circle K Vendor Cyber Rating & Cyber Score

circlek.com

Add Your Compliance Badge

Our mission at Circle K is to make our customers' lives a little easier every day. We are part of communities across North America, Europe, Asia, and the Middle East, helping us grow into one of the world’s leading convenience and fuel retail businesses. Our parent company, Alimentation Couche-Tard (“Couche-Tard”), is a leader in the Canadian convenience store industry. Together, we are brightening journeys across more than 14,200 stores in 26 countries worldwide. We’re all about Growing Together. Learn how you can join our team today: https://workwithus.circlek.com. Work with us, and we’ll make it work for you. Find out more at https://www.circlek.com/ or connect with us on Facebook, Instagram, or Twitter.

Circle K A.I CyberSecurity Scoring

Scoring History

Circle K

Circle K CyberSecurity News & History

Past Incidents

Attack Types

Entity

Type

Severity

Impact

Seen

Blog Details

Supply Chain Source

Incident Details

View

Circle K

Breach

5/2024

CIR233282311212...

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A.I.

Circle K 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 Circle K

Incidents vs Retail Industry Avg (This Year)

No incidents recorded for Circle K in 2026.

Incidents vs All-Companies Average (This Year)

No incidents recorded for Circle K in 2026.

Incident Types Circle K vs Retail Industry Avg (This Year)

No incidents recorded for Circle K in 2026.

Incident History - Circle K (X = Date, Y = Severity)

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SUBSIDIARY

Circle K Subsidiaries

Parent Company

Circle K

Retail

Website: http://www.circlek.com/

Company Size: 10,000+ employees

No subsidiary data available for this company.

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ICA Gruppen´s core business is retail. The Group includes ICA Sweden which mainly conduct grocery retail, ICA Real Estate which owns and manages properties, ICA Bank which offers financial services and insurances, Apotek Hjärtat which conducts pharmacy operations. Guidelines: Comments in our channels that are offensive or abusive in nature will be removed.

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NEWS

Circle K CyberSecurity News

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

March 19, 2026 11:13 PM

Thomasville’s Circle K shuts down for tank upgrades

The media could not be loaded, either because the server or network failed or because the format is not supported. Error Code: 400-4.

Read Article

February 10, 2026 08:00 AM

What Minimum Viable Cybersecurity Really Looks Like for K–12 Districts

As ransomware and phishing attacks grow more sophisticated, districts can't rely on perimeter defenses alone. Here's what experts say the...

Read Article

January 29, 2026 08:00 AM

Auditors at Bitpanda’s German subsidiary flagged information security issues, echoing regulator's concerns

The crypto exchange said it had addressed authorities' concerns, but an internal report has cast doubt on those claims, according to a new...

Read Article

January 07, 2026 08:00 AM

Monster Energy Unleashes New ‘Ultra Punk Punch’ Flavor at Circle K

CHARLOTTE, N.C., January 07, 2026--Monster Energy's new zero-sugar Ultra Punk Punch flavor debuts exclusively at Circle K U.S. stores ahead...

Read Article

December 10, 2025 08:00 AM

2025 Leading Global Cybersecurity Programs and Instructors Announced by EC-Council

TAMPA, Fla., December 10, 2025 – EC-Council is proud to announce its 2025 Academia Award winners. These partners and instructors have made a lasting impact...

Read Article

October 09, 2025 07:00 AM

Circle K Launches "Hero Day" on October 16th to Support Ontario Children's Hospitals

Circle K is proud to announce its inaugural Hero Day on Thursday, October 16, 2025, a special initiative dedicated to supporting local...

Read Article

October 01, 2025 07:00 AM

K–12 Districts Train the Next Generation of Cybersecurity Professionals

A growing number of districts are offering classes and programs designed to prepare students for careers in cybersecurity.

Read Article

September 24, 2025 07:00 AM

Circle K Hong Kong disrupted by potential cyberattack

Global convenience store and gas station chain Circle K had its operations in Hong Kong crippled for days following a "network disruption"...

Read Article

September 18, 2025 07:00 AM

K-12 schools face cybersecurity risks inside and outside of the classroom

As students return to school, it's crucial for administrators and IT teams to stay vigilant against opportunistic threat actors.

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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