CVE-2026-113771
MEDIUMCVSS 5.5/10
Last modified
CVE-2026-113771 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. Off-by-one error in Windows Container Isolation FS Filter Driver (unionfs.sys) allows an authorized attacker to elevate privileges locally..
Description
Off-by-one error in Windows Container Isolation FS Filter Driver (unionfs.sys) allows an authorized attacker to elevate privileges locally.
Metrics
Weakness Enumeration
Affected Software
Source: CNA advisory (CVE.org). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Windows 11 version 26H1 | >= 10.0.28000.0, < 10.0.28000.3501 |
References
Timeline
- Published
- Last Modified
- Status
- Awaiting Analysis
Frequently Asked Questions
What is CVE-2026-113771?
Off-by-one error in Windows Container Isolation FS Filter Driver (unionfs.sys) allows an authorized attacker to elevate privileges locally.
How severe is CVE-2026-113771?
CVE-2026-113771 has a CVSS score of 5.5/10 (MEDIUM severity).
How do I fix CVE-2026-113771?
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-2026-113765Heap-based buffer overflow in Windows File Server Resource M…7.8
- CVE-2026-113766Weak authentication in Windows Language Experience Service a…3.3
- CVE-2026-113767Inclusion of functionality from untrusted control sphere in …7.8
- CVE-2026-113768Heap-based buffer overflow in Windows Performance Counters a…7.5
- CVE-2026-113769Use after free in Windows COM+ Event System Service allows a…7
- CVE-2026-113770Untrusted pointer dereference in Windows Print Spooler Compo…7
- CVE-2026-113772Time-of-check time-of-use (toctou) race condition in Windows…4.7
- CVE-2026-113773Improper access control in Windows DHCP Server allows an una…5.3
- CVE-2026-113775A maliciously crafted dynamic library, when loaded from an a…7.8
- CVE-2026-113776virtualenv is a tool for creating isolated virtual python en…7.8
- CVE-2026-113779The pfSense REST API package is an unofficial, open-source R…8.8
- CVE-2026-11378IBM MQ could allow an authenticated attacker to cause a deni…8.8
Are you affected by CVE-2026-113771?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST