What is CVE-2026-62871?

CVE-2026-62871 is a high-severity vulnerability in Microsoft Visual Studio 2022 Version 17.14, classified under Heap-based Buffer Overflow. CVSS score: 7.8/10. Published 2026-08-11.

How severe is CVE-2026-62871?

High severity. CVSS v3 base score is 7.8 out of 10.

Buffer overflow in Microsoft Visual Studio 2022 Version 17.14

CVE-2026-62871

Out-of-bounds write in .NET allows an unauthorized attacker to execute code locally.

Vulnerability class: Buffer Overflow

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

Affected products

Microsoft Visual Studio 2022 Version 17.14 — versions 17.14.0
Microsoft Visual Studio 2026 Version 18.8 — versions 18.0
Microsoft .Net 10.0 — versions 10.0.0
Microsoft .Net 8.0 — versions 8.0.0
Microsoft .Net 9.0 — versions 9.0.0

Weakness classification (CWE)

CWE-122 — Heap-based Buffer Overflow
CWE-787 — Out-of-bounds Write

References

.NET Elevation of Privilege Vulnerability (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-62871?: CVE-2026-62871 is a high-severity vulnerability in Microsoft Visual Studio 2022 Version 17.14, classified under Heap-based Buffer Overflow. CVSS score: 7.8/10. Published 2026-08-11.
How severe is CVE-2026-62871?: High severity. CVSS v3 base score is 7.8 out of 10.