How severe is CVE-2026-66691?

CVE-2026-66691 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-66691 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (26th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-66691?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2026-66691 published?

CVE-2026-66691 was published on 2026-08-13 and last updated on 2026-08-14.

CVE-2026-66691

CVE-2026-66691 is a critical-severity vulnerability with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-640.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 0% (26th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-640
Published: 2026-08-13
Last modified: 2026-08-14

Description

Unauthenticated Broken Access Control in Nokri <= 1.6.6 versions.

Frequently asked questions

What is CVE-2026-66691?: Unauthenticated Broken Access Control in Nokri <= 1.6.6 versions.
How severe is CVE-2026-66691?: CVE-2026-66691 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-66691 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (26th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-66691?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2026-66691 published?: CVE-2026-66691 was published on 2026-08-13 and last updated on 2026-08-14.

References

https://patchstack.com/database/wordpress/theme/nokri/vulnerability/wordpress-nokri-theme-1-6-6-broken-access-control-vulnerability?_s_id=cve

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