High severity8.8NVD Advisory· Published Sep 8, 2026· Updated Sep 29, 2026
CVE-2026-69439
CVE-2026-69439
Description
Heap-based buffer overflow in .NET and Visual Studio allows an unauthorized attacker to elevate privileges over a network.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
Microsoft.DiaSymReader.NativeNuGet | >= 17.10.0-beta1.24272.1, < 18.9.0-beta1.26405.2 | 18.9.0-beta1.26405.2 |
Affected products
4- osv-coords2 versions
>= 8.0.0, < 8.0.31+ 1 more
- (no CPE)range: >= 8.0.0, < 8.0.31
- (no CPE)range: >= 8.0.0, < 8.0.31
Patches
Vulnerability mechanics
References
4- msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69439nvdPatchVendor AdvisoryWEB
- github.com/advisories/GHSA-527h-q9f6-p7qxghsaADVISORY
- nvd.nist.gov/vuln/detail/cve-2026-69439ghsaADVISORY
- github.com/dotnet/runtime/security/advisories/GHSA-527h-q9f6-p7qxghsaWEB
News mentions
2- Patch Tuesday - September 2026Rapid7 Blog · Sep 8, 2026
- Massive Microsoft Patch Tuesday September 2026 – 973 Vulnerabilities Fixed, Including 2 Zero-DaysCyber Security News · Sep 8, 2026