CVE-2026-118147

Visual Studio Spoofing Vulnerability

publishedCWE-295

Improper certificate validation in Visual Studio allows an unauthorized attacker to perform spoofing over a network.

Technical severity7.4 highCVSS 3.1 · CNA: microsoft

Published2026-10-31Source updated 2026-11-07

Collected2026-11-073 attributed sources

Fixes and workarounds

Fix

The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.

Source: CNA: microsoft

Affected products and versions

Affected products, source version ranges and reporting authorities
Product	Versions	Authority
Microsoft Visual Studio 2017 version 15.9 Microsoft	≥ 15.9.0; < 15.9.84 (affected, custom)	CNA: microsoft
Microsoft Visual Studio 2019 version 16.11 Microsoft	≥ 16.11.0; < 16.11.62 (affected, custom)	CNA: microsoft
Microsoft Visual Studio 2022 version 17.14 Microsoft	≥ 17.14.0; < 17.14.44 (affected, custom)	CNA: microsoft
Microsoft Visual Studio 2026 version 18.11 Microsoft	≥ 18.11.0; < 18.11.3 (affected, custom)	CNA: microsoft

Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.

CVSS assessments

CVSS scores, vectors and reporting authorities
Version / score	Vector	Authority
3.1 / 7.4 high	`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C`	CNA: microsoft
3.1 / 7.4 high	`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N`	NVD: [email protected]

Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-118147CNA: microsoft · vendor-advisory, patch
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-118147[email protected]

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