CVE-2026-69439CWE-122

CVE-2026-69439

High · published September 8, 2026

CVSS v3.1
8.8
EPSS
1%
Percentile
57.5
In the wild
Unconfirmed
What it is

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

The record
Technical detail
CVSS v3.1
8.8 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00841 · 57.5th percentile
Weakness
CWE-122 · Heap-based Buffer Overflow
Published
2026-09-08T22:19Z
Affected products (12)
ProductVersionsFixed in
microsoft/.net≥ 8.0.0, < 8.0.318.0.31
microsoft/.net≥ 9.0.0, < 9.0.209.0.20
microsoft/.net≥ 10.0.0, < 10.0.1210.0.12
microsoft/.netall versions—
microsoft/.netall versions—
microsoft/.netall versions—
microsoft/.netall versions—
microsoft/.netall versions—
microsoft/.netall versions—
microsoft/.netall versions—
microsoft/visual_studio_2022≥ 17.14.0, < 17.14.4017.14.40
microsoft/visual_studio_2026≥ 18.9.0, < 18.9.318.9.3
References (1)
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69439 · [email protected]
EPSS history
Timeline
  • 10 SEP 03:17Z
    EPSS moved — → 1%
    epss
  • 08 SEP 17:17Z
    .NET and Visual Studio Elevation of Privilege Vulnerability
    cvelistv5