CVE-2025-26633
Microsoft Windows Management Console (MMC) Improper Neutralization Vulnerability
Microsoft Windows
Improper neutralization in Microsoft Management Console allows an unauthorized attacker to bypass a security feature locally.
Exploitation status
CISA Known Exploited Vulnerabilities
Listed by CISA on 11 March 2025. US federal agencies were required to remediate it by 1 April 2025. CISA records this vulnerability as known to be used in ransomware campaigns.
EPSS — exploitation probability
FIRST puts the probability of exploitation activity in the next 30 days at 30.4%, which is higher than 98.2% of all scored vulnerabilities. EPSS is a forecast of activity, not a measure of severity, and it is rescored daily.
CVSS vector
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Frequently asked questions
Is CVE-2025-26633 being exploited by ransomware groups?
No ransomware group in this database is currently recorded as exploiting CVE-2025-26633.
What does CVE-2025-26633 affect?
CVE-2025-26633 affects Microsoft Windows. Improper neutralization in Microsoft Management Console allows an unauthorized attacker to bypass a security feature locally.
How severe is CVE-2025-26633?
CVE-2025-26633 is rated HIGH with a CVSS base score of 7. EPSS puts the probability of exploitation in the next 30 days at 30.4%, higher than 98.2% of all scored vulnerabilities. It is listed in the CISA Known Exploited Vulnerabilities catalog, with a federal remediation deadline of 1 April 2025.
How should organisations respond to CVE-2025-26633?
Apply the vendor patch for Microsoft Windows as the first priority, and treat any internet-facing instance as the most urgent. Because this vulnerability is associated with ransomware activity, also review whether the affected systems were reachable before patching, rather than assuming that patching alone closes the incident.