CVE-2026-58649CWE-346

CVE-2026-58649

Medium · published September 8, 2026

CVSS v3.1
6.5
EPSS
0%
Percentile
17.8
In the wild
Unconfirmed
What it is

Origin validation error in .NET allows an unauthorized attacker to disclose information over a network.

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00266 · 17.8th percentile
Weakness
CWE-346 · Origin Validation Error
Published
2026-09-08T22:17Z
Affected products (15)
ProductVersionsFixed in
microsoft/.netall versions—
microsoft/.netall versions—
microsoft/.netall versions—
microsoft/.netall versions—
microsoft/.netall versions—
microsoft/.netall versions—
microsoft/.netall versions—
microsoft/.net_sdk≥ 8.0.100, < 8.0.1308.0.130
microsoft/.net_sdk≥ 8.0.200, < 8.0.4248.0.424
microsoft/.net_sdk≥ 9.0.100, < 9.0.1209.0.120
microsoft/.net_sdk≥ 9.0.200, < 9.0.3179.0.317
microsoft/.net_sdk≥ 10.0.100, < 10.0.11110.0.111
microsoft/.net_sdk≥ 10.0.200, < 10.0.40010.0.400
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-2026-58649 · [email protected]
EPSS history
Timeline
  • 10 SEP 03:17Z
    EPSS moved — → 0%
    epss
  • 08 SEP 17:17Z
    .NET Information Disclosure Vulnerability
    cvelistv5