CVE-2025-26633: Microsoft Windows Management Console (MMC) Improper Neutralization Vulnerability

Is it exploited?

Yes. CISA added it to the Known Exploited Vulnerabilities catalog on 11 Mar 2025, the same day the CVE record was published.

How likely is exploitation in the next 30 days?

30.4%

EPSS score, percentile 98.2 of all scored records

How severe?

7.0 High

CVSS v3.1 base score, given by the CNA

What should I do?

Required action (CISA), due 1 Apr 2025: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Advisories and patches (1)

Which versions are affected?

Affected: 10.0.10240.0 up to, not including, 10.0.10240.20947; 10.0.14393.0 up to, not including, 10.0.14393.7876; 10.0.17763.0 up to, not including, 10.0.17763.7009; 10.0.19044.0 up to, not including, 10.0.19044.5608; 10.0.19045.0 up to, not including, 10.0.19045.5608; 10.0.22621.0 up to, not including, 10.0.22621.5039; 10.0.22631.0 up to, not including, 10.0.22631.5039; 10.0.22631.0 up to, not including, 10.0.22631.5039; 10.0.26100.0 up to, not including, 10.0.26100.3476; 6.1.7601.0 up to, not including, 6.1.7601.27618; 6.1.7601.0 up to, not including, 6.1.7601.27618; 6.0.6003.0 up to, not including, 6.0.6003.23168; 6.0.6003.0 up to, not including, 6.0.6003.23168; 6.2.9200.0 up to, not including, 6.2.9200.25368; 6.2.9200.0 up to, not including, 6.2.9200.25368; 6.3.9600.0 up to, not including, 6.3.9600.22470; 6.3.9600.0 up to, not including, 6.3.9600.22470; 10.0.14393.0 up to, not including, 10.0.14393.7876; 10.0.14393.0 up to, not including, 10.0.14393.7876; 10.0.17763.0 up to, not including, 10.0.17763.7009

Versions by product

Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of 28 Oct 2026; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 28 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.

What to do

CISA due date for this action: 1 April 2025.

Advisories and patches

• Microsoft Management Console Security Feature Bypass Vulnerability (Vendor advisory, Patch)

Linked from CISA's catalog entry

• https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2025-26633
• https://nvd.nist.gov/vuln/detail/CVE-2025-26633

Affected products and versions

As listed in the CVE record.

Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.

About this vulnerability

Microsoft Windows Management Console (MMC) contains an improper neutralization vulnerability that allows an unauthorized attacker to bypass a security feature locally.

Summary: CISA's KEV catalog, as of 28 Oct 2026.

• CISA added CVE-2025-26633 to its Known Exploited Vulnerabilities (KEV) catalog on 11 Mar 2025.
• CISA marks it as known to be used in ransomware campaigns.
• The due date CISA sets for the required action is 1 Apr 2025.
• The CVE record was published on 11 Mar 2025, the same day it was added to KEV.
• The CVE record carries a CVSS v3.1 base score of 7.0 (High), given by its CNA.
• FIRST's EPSS model puts the probability of exploitation in the next 30 days at 30.4% (percentile 98.2), as of 28 Oct 2026.
• CISA's SSVC assessment in the CVE record: exploitation active, automatable no, technical impact total.

Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of 28 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 28 Oct 2026. About the data.

Description

Microsoft Management Console Security Feature Bypass Vulnerability

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

Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.

Weakness

• CWE-707: Improper Neutralization

CWE and CAPEC are maintained by MITRE; the entries are those named in the CVE record and the KEV entry.

Timeline

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