CVE-2026-54127
HIGHCVSS 8.4/10EPSS 0.24%
Last modified
CVE-2026-54127 is a high-severity vulnerability rated 8.4/10 on the CVSS scale. Use after free in Windows Hyper-V allows an unauthorized attacker to elevate privileges locally.. EPSS estimates a 0.24% chance of exploitation in the next 30 days.
Description
Use after free in Windows Hyper-V allows an unauthorized attacker to elevate privileges locally.
Metrics
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Windows 11 24h2 | < 10.0.26100.8875 |
| Microsoft | Windows 11 25h2 | < 10.0.26200.8875 |
| Microsoft | Windows 11 26h1 | < 10.0.28000.2525 |
| Microsoft | Windows Server 2022 | < 10.0.20348.5386 |
| Microsoft | Windows Server 2025 | < 10.0.26100.33158 |
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-54127Patch, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2026-54127?
Use after free in Windows Hyper-V allows an unauthorized attacker to elevate privileges locally.
How severe is CVE-2026-54127?
CVE-2026-54127 has a CVSS score of 8.4/10 (HIGH severity). The EPSS model estimates a 0.24% probability of exploitation in the next 30 days.
How do I fix CVE-2026-54127?
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
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- 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.
Related CVEs from 2026
- CVE-2026-54121Improper authorization in Active Directory Certificate Servi…8.8
- CVE-2026-54122Heap-based buffer overflow in Windows GDI+ allows an unautho…8.4
- CVE-2026-54123Exposure of sensitive information to an unauthorized actor i…5.5
- CVE-2026-54124Integer overflow or wraparound in Windows Terminal allows an…7.8
- CVE-2026-54125Concurrent execution using shared resource with improper syn…7.8
- CVE-2026-54126Out-of-bounds read in Windows RDP allows an unauthorized att…6.5
- CVE-2026-54128Use after free in Windows DHCP Client allows an unauthorized…8.4
- CVE-2026-54129Use after free in Windows Hyper-V allows an authorized attac…7.8
- CVE-2026-5413A vulnerability was identified in Newgen OmniDocs up to 12.0…3.7
- CVE-2026-54130Missing authentication for critical function in M365 Copilot…7.5
- CVE-2026-54131Use after free in Microsoft Office Excel allows an unauthori…7.8
- CVE-2026-54132Heap-based buffer overflow in Windows Kernel allows an unaut…6.8
Are you affected by CVE-2026-54127?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST