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CVE-2026-21509
HIGHCISA KEV7.8
Beschreibung
Reliance on untrusted inputs in a security decision in Microsoft Office allows an unauthorized attacker to bypass a security feature locally.
CVE Details
CVSS v3.1 Bewertung7.8
SchweregradHIGH
CVSS VektorCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
AngriffsvektorLOCAL
KomplexitatLOW
Erforderliche PrivilegienNONE
BenutzerinteraktionREQUIRED
Veroffentlicht1/26/2026
Zuletzt geandert2/11/2026
Quellekev
Honeypot-Sichtungen0
CISA KEV
HerstellerMicrosoft
ProduktOffice
SchwachstellennameMicrosoft Office Security Feature Bypass Vulnerability
KEV Aufnahmedatum2026-01-26
Behebungsfrist2026-02-16
Ransomware-NutzungUnknown
Betroffene Produkte
microsoft:365_appsmicrosoft:officemicrosoft:office_long_term_servicing_channel
Schwachen (CWE)
CWE-807
Referenzen
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21509(secure@microsoft.com)
https://www.vicarius.io/vsociety/posts/cve-2026-21509-detection-script-microsoft-office-security-feature-bypass-vulnerability(af854a3a-2127-422b-91ae-364da2661108)
https://www.vicarius.io/vsociety/posts/cve-2026-21509-mitigation-script-microsoft-office-security-feature-bypass-vulnerability(af854a3a-2127-422b-91ae-364da2661108)
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-21509(134c704f-9b21-4f2e-91b3-4a467353bcc0)
IOC Korrelationen
Keine Korrelationen erfasst
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