CVE-2026-50659CWE-116

CVE-2026-50659

Medium · published July 15, 2026

CVSS v3.1
6.5
EPSS
1%
Percentile
54.0
In the wild
Unconfirmed
What it is

Improper encoding or escaping of output in .NET allows an authorized attacker to perform spoofing over a network.

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
CVSS v4.0
Not supplied
EPSS
0.00738 · 54.0th percentile
Weakness
CWE-116 · Improper Encoding or Escaping of Output
Published
2026-07-15T00:17Z
Affected products (19)
ProductVersionsFixed in
microsoft/.net_frameworkall versions—
microsoft/.net_frameworkall versions—
microsoft/.net_frameworkall versions—
microsoft/.net_frameworkall versions—
microsoft/.net_frameworkall versions—
microsoft/.net_frameworkall versions—
microsoft/.net≥ 8.0.0, < 8.0.298.0.29
microsoft/.net≥ 9.0.0, < 9.0.189.0.18
microsoft/.net≥ 10.0.0, < 10.0.610.0.6
microsoft/.net_frameworkall versions—
microsoft/.net_frameworkall versions—
microsoft/.net_frameworkall versions—
microsoft/.net_frameworkall versions—
microsoft/.net_frameworkall versions—
microsoft/.net_frameworkall versions—
microsoft/.net_frameworkall versions—
microsoft/visual_studio_2022≥ 17.12.0, < 17.12.2217.12.22
microsoft/visual_studio_2022≥ 17.14.0, < 17.14.3617.14.36
microsoft/visual_studio_2026≥ 18.7.0, < 18.7.418.7.4
References (1)
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50659 · [email protected]
EPSS history
Timeline
  • 14 JUL 19:40Z
    .NET Spoofing Vulnerability
    cvelistv5