CVE-2026-69439
HIGHCVSS 8.8/10
Last modified
CVE-2026-69439 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. Heap-based buffer overflow in .NET and Visual Studio allows an unauthorized attacker to elevate privileges over a network..
Description
Heap-based buffer overflow in .NET and Visual Studio allows an unauthorized attacker to elevate privileges over a network.
Metrics
Weakness Enumeration
Affected Software
Source: CNA advisory (CVE.org). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | .NET 10.0 | >= 10.0.0, < 10.0.12 |
| Microsoft | .NET 11.0 | >= 11.0.0, < 11.0 RC1 |
| Microsoft | .NET 8.0 | >= 8.0.0, < 8.0.31 |
| Microsoft | .NET 9.0 | >= 9.0.0, < 9.0.20 |
| Microsoft | Microsoft Visual Studio 2022 version 17.14 | >= 17.14.0, < 17.14.40 |
| Microsoft | Microsoft Visual Studio 2026 version 18.9 | >= 18.9.0, < 18.9.3 |
References
Timeline
- Published
- Last Modified
- Status
- Awaiting Analysis
Frequently Asked Questions
What is CVE-2026-69439?
Heap-based buffer overflow in .NET and Visual Studio allows an unauthorized attacker to elevate privileges over a network.
How severe is CVE-2026-69439?
CVE-2026-69439 has a CVSS score of 8.8/10 (HIGH severity).
How do I fix CVE-2026-69439?
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.
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Are you affected by CVE-2026-69439?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST