Buffer overflow in Microsoft .Net Framework 3.5 And 4.6.2/4.7/4.7.1/4.7.2
CVE-2026-69522
Heap-based buffer overflow in Visual Studio allows an unauthorized attacker to execute code over a network.
Vulnerability class: Buffer Overflow
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
Affected products
- Microsoft .Net Framework 3.5 And 4.6.2/4.7/4.7.1/4.7.2
- Microsoft .Net Framework 3.5 And 4.7.2
- Microsoft .Net Framework 3.5 And 4.8
- Microsoft .Net Framework 3.5 And 4.8.1
- Microsoft .Net Framework 4.6.2/4.7/4.7.1/4.7.2
- Microsoft .Net Framework 4.8
- Microsoft .Net Framework 4.8.1
- Microsoft Visual Studio 2022 Version 17.14
- Microsoft Visual Studio 2026 Version 18.9
- Microsoft .Net 10.0
Weakness classification (CWE)
References
- secure@microsoft.com (vendor-advisory, patch)
Frequently asked questions
- What is CVE-2026-69522?
- CVE-2026-69522 is a high-severity vulnerability in Microsoft .Net Framework 3.5 And 4.6.2/4.7/4.7.1/4.7.2, classified under Heap-based Buffer Overflow. CVSS score: 8.8/10. Published 2026-09-08.
- How severe is CVE-2026-69522?
- High severity. CVSS v3 base score is 8.8 out of 10.