Vulnerability · Published Sep 8, 2026 · Assigned by microsoft
CVE-2026-69522.NET and Visual Studio Remote Code Execution Vulnerability
High 8.8
In plain English
A high-severity heap buffer overflow in Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 from Microsoft. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.8% (higher than 58% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)8.8High
Exploit odds (30 days)0.8%top 42.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Heap-based buffer overflow in Visual Studio allows an unauthorized attacker to execute code over a network.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.23 | dotnet10-runtime | 10.0.13-r0 | ALPINE-CVE-2026-69522 |
| Alpine:v3.24 | dotnet10-runtime | 10.0.12-r0 | ALPINE-CVE-2026-69522 |
| Alpine:v3.22 | dotnet8-runtime | 8.0.31-r0 | ALPINE-CVE-2026-69522 |
| Alpine:v3.23 | dotnet8-runtime | 8.0.31-r0 | ALPINE-CVE-2026-69522 |
| Alpine:v3.24 | dotnet8-runtime | 8.0.31-r0 | ALPINE-CVE-2026-69522 |
| Alpine:v3.22 | dotnet9-runtime | 9.0.20-r0 | ALPINE-CVE-2026-69522 |
| Alpine:v3.23 | dotnet9-runtime | 9.0.20-r0 | ALPINE-CVE-2026-69522 |
| Alpine:v3.24 | dotnet9-runtime | 9.0.20-r0 | ALPINE-CVE-2026-69522 |
| NuGet | microsoft.diasymreader.native | 18.9.0-beta1.26405.2 | GHSA-2j8r-3c22-8565 |
| Ubuntu:22.04:LTS | dotnet7 | no fix listed | UBUNTU-CVE-2026-69522 |
Affected products (as reported)
Weakness: CWE-122 · Vector: 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
References
- .NET and Visual Studio Remote Code Execution Vulnerability vendor-advisory, patch