CVE-2026-66804
HIGHCVSS 7.8/10EPSS 3.03%
Last modified
CVE-2026-66804 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. Improper access control in Windows Cross Device Service allows an authorized attacker to elevate privileges locally.. EPSS estimates a 3.03% chance of exploitation in the next 30 days.
Description
Improper access control in Windows Cross Device Service allows an authorized attacker to elevate privileges locally.
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Windows 10 22h2 | < 10.0.19045.7663 |
| Microsoft | Windows 11 24h2 | < 10.0.26100.9106 |
| Microsoft | Windows 11 25h2 | < 10.0.26200.9106 |
| Microsoft | Windows 11 26h1 | < 10.0.28000.2704 |
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-66804Vendor Advisory, Patch
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2026-66804?
Improper access control in Windows Cross Device Service allows an authorized attacker to elevate privileges locally.
How severe is CVE-2026-66804?
CVE-2026-66804 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 3.03% probability of exploitation in the next 30 days.
How do I fix CVE-2026-66804?
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.
How Strix Helps
- Uncovering a hidden BOLA in Appsmith's snapshot logicStrix autonomously discovered a BOLA/IDOR vulnerability in Appsmith's snapshot deletion path.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2026-66804?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST