CVE-2026-21509
Microsoft Office Security Feature Bypass Vulnerability
- 대응 우선순위
- 최우선
- CVSS
- 7.8
- EPSS
- 72.2% 백분위 99.4% · 2026.06.27 기준
- CISA KEV
- 등록
- 조치 기한
- 2026.02.16
- 공개일
- 2026.01.27
CISA KEV에 등록된 실제 악용 확인 취약점
Reliance on untrusted inputs in a security decision in Microsoft Office allows an unauthorized attacker to bypass a security feature locally.
공급사 Microsoft
제품 Microsoft 365 Apps for Enterprise, Microsoft Office 2016, Microsoft Office 2019
영향 버전 16.0.1, 16.0.0, 19.0.0, 2016, 2019, 2021, 2024
수정 버전 공식 출처에서 확인 필요
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
조치 기한: 2026.02.16CVSS 벡터 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CWE CWE-807
KEV 등록일 2026.01.26
랜섬웨어 캠페인 사용 미확인
CISA 비고 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
EPSS 데이터 기준일 2026.06.27