What is CVE-2026-58649?

CVE-2026-58649 is a medium-severity vulnerability in Microsoft Visual Studio 2022 Version 17.14, classified under Origin Validation Error. CVSS score: 6.5/10. Published 2026-09-08.

How severe is CVE-2026-58649?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Microsoft Visual Studio 2022 Version 17.14

CVE-2026-58649

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

Published 2026-09-08 · last modified 2026-10-07.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.003 (17.8th percentile), scored 2026-10-24.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 18th percentile — 17.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: -0.000

Affected products

Weakness classification (CWE)

CWE-346 — Origin Validation Error

References

.NET Information Disclosure Vulnerability (vendor-advisory, Patch, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2026-58649?: CVE-2026-58649 is a medium-severity vulnerability in Microsoft Visual Studio 2022 Version 17.14, classified under Origin Validation Error. CVSS score: 6.5/10. Published 2026-09-08.
How severe is CVE-2026-58649?: Medium severity. CVSS v3 base score is 6.5 out of 10.