Heap-based buffer overflow in Visual Studio allows an unauthorized attacker to execute code over a network.

How serious is it

• Severity: high, CVSS score 8.8 out of 10.
• No exploit prediction (EPSS) score yet.
• Not on the CISA list of exploited vulnerabilities.
• No public exploit in Exploit-DB.

Who is affected

• Microsoft .NET 10.0: 10.0.0 <10.0.12
• Microsoft Microsoft Visual Studio 2022 version 17.14: 17.14.0 <17.14.40
• Microsoft Microsoft .NET Framework 4.8: 4.8.0 <4.8.4806.0
• Microsoft Microsoft .NET Framework 4.8.1: 4.8.0.0 <4.8.9347.0
• Microsoft Microsoft .NET Framework 3.5 AND 4.8: 4.8.0 <2.0.50727.9070 & 3.0.30729.9068 & 4.8.4806.0
• Microsoft Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2: 3.0.0.0 <2.0.50727.8984 & 3.0.30729.8980 & 4.7.4145.0
• Microsoft Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2: 4.7.0 <4.7.4145.0
• Microsoft .NET 11.0: 11.0.0 <11.0 RC1
• Microsoft .NET 9.0: 9.0.0 <9.0.20
• Microsoft Microsoft .NET Framework 3.5 AND 4.7.2: 4.7.0 <2.0.50727.9070 & 3.0.30729.9068 & 4.7.4145.0

How to check

1. Find out whether you run the affected product and which version, then compare it with the versions above.

How to fix

1. Apply the vendor's update or mitigation from the references below. If there is none yet, limit exposure of the affected service until there is.
2. If a vulnerable version was live, check your logs and rotate the secrets that server could read.

The advisory

Check your whole app

Dependencies are only half of it. Free and read-only: before you push, run npx shippable-dev scan localhost:3000 in your project folder, no account needed. For your live app, you prove it's yours with a one-line tag first.

References

• msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69522

Merged from ENISA EUVD. Last updated 27 Oct 2026. All vulnerabilities · RSS · JSON