CVE-2025-26633

HIGH7.0

CISA KEV

Published 2025-03-11 · Updated 2026-09-24 · Source secure@microsoft.com

Summary

CVE-2025-26633 is a high-severity (CVSS 7.0) vulnerability in Microsoft Windows. CISA added it to the Known Exploited Vulnerabilities catalog on March 11, 2025, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by April 1, 2025. CISA also lists it as known to be used in ransomware campaigns, so it should be prioritised accordingly. Microsoft has 390 vulnerabilities in the KEV catalog, 117 of them linked to ransomware.

All 390 known-exploited Microsoft vulnerabilities →

Description

Improper neutralization in Microsoft Management Console allows an unauthorized attacker to bypass a security feature locally.

CVSS vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

CWE-707

CISA Known-Exploited Vulnerability

Product: Microsoft — Windows

Name: Microsoft Windows Management Console (MMC) Improper Neutralization Vulnerability

Date added: 2025-03-11 · Due: 2025-04-01

USED IN RANSOMWARE

Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

References

View on NVD

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