CVE-2026-65400

CRITICALCVSS 9.8/10Actively ExploitedEPSS 9.90%

Last modified

CVE-2026-65400 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. An authentication issue was addressed with improved state management. This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.7.9, macOS Sonoma 14.8.9, macOS Tahoe 26.6.1, macOS Tahoe 26.7. CISA has confirmed active exploitation in the wild. EPSS estimates a 9.90% chance of exploitation in the next 30 days.

Description

An authentication issue was addressed with improved state management. This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.7.9, macOS Sonoma 14.8.9, macOS Tahoe 26.6.1, macOS Tahoe 26.7. An attacker on the network may be able to authenticate to Screen Sharing without valid credentials.

Metrics

EPSS Probability
9.90%

95.3th percentile

Probability of exploitation in the next 30 days. Learn more

Exploitation Status

This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by .

Weakness Enumeration

Affected Software

VendorProductVersions
AppleMacos>= 14.0, < 14.8.9
AppleMacos>= 15.0, < 15.7.9
AppleMacos>= 26.0, < 26.6.1

References

Timeline

Published
Last Modified
Status
Analyzed

Frequently Asked Questions

What is CVE-2026-65400?
An authentication issue was addressed with improved state management. This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.7.9, macOS Sonoma 14.8.9, macOS Tahoe 26.6.1, macOS Tahoe 26.7. An attacker on the network may be able to authenticate to Screen Sharing without valid credentials.
How severe is CVE-2026-65400?
CVE-2026-65400 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 9.90% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.
How do I fix CVE-2026-65400?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST