CVE-2026-21509
Microsoft Office Security Feature Bypass Vulnerability
7.8
CVSS 3.1
70.8 %
EPSS (current)
2026-01-26
KEV addition
No
Ransomware
Timeline
Publication, first public exploit and KEV addition on a day axis.
Key facts
Vendor / product: Microsoft / Office
Published: 2026-01-26 · Due (CISA): 2026-02-16
CWE: CWE-807 · EU list: no
Exploit references (metadata only)
No public exploit references recorded.