CISA KEV 정보
| 취약점명 | Microsoft Office Security Feature Bypass Vulnerability |
|---|---|
| 설명 | Microsoft Office contains a security feature bypass vulnerability in which reliance on untrusted inputs in a security decision in Microsoft Office could allow an unauthorized attacker to bypass a security feature locally. Some of the impacted product(s) could be end-of-life (EoL) and/or end-of-service (EoS). Users are advised to discontinue use and/or transition to a supported version. |
| 조치사항 | Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. |
| 랜섬웨어 캠페인 악용 | Unknown |
| CWE | CWE-807 |
| 등록일 (KEV) | 2026-01-26 |
| 조치 기한 | 2026-02-16 |
| 추가 참고 | Please adhere to Microsoft’s recommended guidelines to address this vulnerability. Implement all final mitigations provided by the vendor for Office 2021, and apply the interim corresponding mitigations for Office 2016 and Office 2019 until the final patch becomes available. For more information please see: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21509 ; https://nvd.nist.gov/vuln/detail/CVE-2026-21509 |
NVD 상세 정보
CVSS v3.1: 7.8 HIGH
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H설명: Reliance on untrusted inputs in a security decision in Microsoft Office allows an unauthorized attacker to bypass a security feature locally.
CWE: CWE-807
참조
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21509 [Vendor Advisory]
- https://www.vicarius.io/vsociety/posts/cve-2026-21509-detection-script-microsoft-office-security-feature-bypass-vulnerability [Third Party Advisory]
- https://www.vicarius.io/vsociety/posts/cve-2026-21509-mitigation-script-microsoft-office-security-feature-bypass-vulnerability [Mitigation, Third Party Advisory]
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-21509 [US Government Resource]
This product uses the NVD API but is not endorsed or certified by the NVD.