Vulnerability
CVE-2025-26633
Microsoft Windows: security feature bypass
Most severe levelNo level of its own
Official data
- CVSS 3.1
- 7.0 · high
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H - Weakness
- CWE-707
- EPSS
- 30.39% probability of exploitation in the next 30 days, higher than 98% of CVEs
- CISA KEV catalogue
- Yes, since 11 March 2025 · used in ransomware campaigns
Sources: NVD (CVSS, weakness, publication), FIRST (EPSS), CISA (KEV catalogue).
Data read on 25 October 2026.
Timeline
- 11 March 2025Published on NVD
- 11 March 2025Added to the CISA KEV catalogue
In DefenceLevel briefings2 days
- 9 April 2026Worth watching
- 28 November 2025Worth watching
Last 12 months.
The full analysis is in the briefingThe full analysis is in your archive
Why it matters now, who is affected and what to do: every day at 05:00 UTC, for subscribers.Why it matters, who is affected and what to do, as in the daily briefing.
More exploited Microsoft vulnerabilities