# 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.

- Page: https://www.vulneraibility.com/cve/CVE-2026-65400
- CVSS: 9.8
- Known exploited: yes, in CISA KEV since 2026-08-18; CISA due date 2026-08-21
- EPSS: 1.72%
- Unvetted proof-of-concept code on GitHub: 3 GitHub proofs of concept (first 2026-08-18)
- CISA SSVC: exploitation active, automatable yes, technical impact total (assessed 2026-08-14)
- Weakness: CWE-287
- Published: 2026-08-06

## Affected versions

- Apple macOS: affected < 14.8.9; < 15.7.9; < 26.6.1; < 26.7; < 27

A version outside these ranges is not a statement that it is unaffected.

## References

- [other] https://support.apple.com/en-us/148170
- [other] https://support.apple.com/en-us/148171
- [other] https://support.apple.com/en-us/148172
- [other] https://support.apple.com/en-us/149035
- [other] https://support.apple.com/en-us/149042
- [advisory] https://advisories.ncsc.nl/2026/ncsc-2026-0280.html
- [other] https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-65400
- [other] http://seclists.org/fulldisclosure/2026/Aug/36
- [other] http://seclists.org/fulldisclosure/2026/Aug/37

---
Summary, impact and action are written by the vulneraibility.com AI analysis pipeline from the CVE record, NVD, CISA and FIRST data; verify against the references.