What is CVE-2026-69439?

CVE-2026-69439 is a high-severity vulnerability in Microsoft Visual Studio 2022 Version 17.14, classified under Heap-based Buffer Overflow. CVSS score: 8.8/10. Published 2026-09-08.

How severe is CVE-2026-69439?

High severity. CVSS v3 base score is 8.8 out of 10.

Buffer overflow in Microsoft Visual Studio 2022 Version 17.14

CVE-2026-69439

Heap-based buffer overflow in .NET and Visual Studio allows an unauthorized attacker to elevate privileges over a network.

Vulnerability class: Buffer Overflow

Published 2026-09-08 · last modified 2026-09-29.

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.

EPSS exploit prediction

EPSS: 0.008 (57.5th percentile), scored 2026-10-24.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 57th percentile — 57.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.008 · change: -0.000

Affected products

Weakness classification (CWE)

CWE-122 — Heap-based Buffer Overflow

References

.NET and Visual Studio Elevation of Privilege Vulnerability (vendor-advisory, Patch, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2026-69439?: CVE-2026-69439 is a high-severity vulnerability in Microsoft Visual Studio 2022 Version 17.14, classified under Heap-based Buffer Overflow. CVSS score: 8.8/10. Published 2026-09-08.
How severe is CVE-2026-69439?: High severity. CVSS v3 base score is 8.8 out of 10.