Vulnerability details
CVE-2026-69439
Microsoft NET runtimeMicrosoft Visual Studio
.NET and Visual Studio Elevation of Privilege Vulnerability
CVSS 3.1
8.8High
Official description
Heap-based buffer overflow in .NET and Visual Studio allows an unauthorized attacker to elevate privileges over a network.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 8.8High | 3.1 | CVEProject cvelistV5 (CNA) (microsoft) | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| Microsoft | .NET 10.0 runtime | 10.0.0 ≤ v < 10.0.12 | CVEProject cvelistV5 (CNA) |
| Microsoft | .NET 11.0 runtime | 11.0.0 ≤ v < 11.0 RC1 | CVEProject cvelistV5 (CNA) |
| Microsoft | .NET 8.0 runtime | 8.0.0 ≤ v < 8.0.31 | CVEProject cvelistV5 (CNA) |
| Microsoft | .NET 9.0 runtime | 9.0.0 ≤ v < 9.0.20 | CVEProject cvelistV5 (CNA) |
| Microsoft | Microsoft Visual Studio 2022 version 17.14 | 17.14.0 ≤ v < 17.14.40 | CVEProject cvelistV5 (CNA) |
| Microsoft | Microsoft Visual Studio 2026 version 18.9 | 18.9.0 ≤ v < 18.9.3 | CVEProject cvelistV5 (CNA) |
References and advisories
1- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69439 vendor-advisorypatch
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Details
- Published
- 2026-09-08
- Last updated
- 2026-10-31
- State
- Published
- Assigner (CNA)
- microsoft
Exploit prediction (EPSS)
0.81%
Probability of exploitation in 30 days
57.3%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- No
- Exploitation
- None
- Technical impact
- Total
Weaknesses (CWE)
- CWE-122Heap-based Buffer Overflow