CVE-2026-71338
MEDIUMCVSS 6.4/10EPSS 0.28%
Last modified
CVE-2026-71338 is a medium-severity vulnerability rated 6.4/10 on the CVSS scale. Double free in Windows Failover Cluster allows an authorized attacker to elevate privileges locally.. EPSS estimates a 0.28% chance of exploitation in the next 30 days.
Description
Double free in Windows Failover Cluster allows an authorized attacker to elevate privileges locally.
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Windows 10 1607 | < 10.0.14393.9512 |
| Microsoft | Windows 10 1809 | < 10.0.17763.9245 |
| Microsoft | Windows Server 2012 | All versions |
| Microsoft | Windows Server 2012 | r2 |
| Microsoft | Windows Server 2016 | < 10.0.14393.9512 |
| Microsoft | Windows Server 2019 | < 10.0.17763.9245 |
| Microsoft | Windows Server 2022 | < 10.0.20348.5622 |
| Microsoft | Windows Server 2025 | < 10.0.26100.33438 |
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-71338Patch, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2026-71338?
Double free in Windows Failover Cluster allows an authorized attacker to elevate privileges locally.
How severe is CVE-2026-71338?
CVE-2026-71338 has a CVSS score of 6.4/10 (MEDIUM severity). The EPSS model estimates a 0.28% probability of exploitation in the next 30 days.
How do I fix CVE-2026-71338?
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-2026-71331Integer overflow or wraparound in Windows Device Health Atte…8.1
- CVE-2026-71332Use after free in Windows Secure Socket Tunneling Protocol (…7
- CVE-2026-71333Use after free in Windows Remote Access Connection Manager a…7
- CVE-2026-71334Heap-based buffer overflow in Windows NFS Portmapper allows …7.8
- CVE-2026-71336Integer overflow or wraparound in Windows Work Folder Servic…8.8
- CVE-2026-71337Stack-based buffer overflow in Windows Storage Management Pr…7.8
- CVE-2026-71339Heap-based buffer overflow in Windows Installer allows an au…6.7
- CVE-2026-7134A vulnerability was identified in code-projects Online Lot R…4.7
- CVE-2026-71340Use after free in Windows File History Service allows an aut…7
- CVE-2026-71341Out-of-bounds read in Windows Partition Management Driver al…5.5
- CVE-2026-71342Use after free in Windows Remote Access Connection Manager a…7
- CVE-2026-71343Heap-based buffer overflow in Windows Remote Access Connecti…7.8
Are you affected by CVE-2026-71338?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST