CVE-2026-56155
Microsoft Active Directory Federation Services Insufficient Granularity of Access Control Vulnerability
- 대응 우선순위
- 최우선
- CVSS
- 7.8
- EPSS
- - 백분위 -
- CISA KEV
- 등록
- 조치 기한
- 2026.07.28
- 공개일
- 2026.07.15
CISA KEV에 등록된 실제 악용 확인 취약점
Insufficient granularity of access control in Active Directory Federation Services (AD FS) allows an authorized attacker to elevate privileges locally.
제품 Microsoft Windows 10 Version 1607, Windows 10 Version 1809, Windows Server 2012
영향 버전 Microsoft Windows 10 Version 1607, Windows 10 Version 1809, Windows Server 2012 >= 10.0.14393.0 < 10.0.14393.9339, >= 10.0.17763.0 < 10.0.17763.9020, >= 6.2.9200.0 < 6.2.9200.26226, >= 6.3.9600.0 < 6.3.9600.23291, >= 10.0.20348.0 < 10.0.20348.5386, >= 10.0.26100.0 < 10.0.26100.33158, < 10.0.14393.9339, < 10.0.17763.9020, r2, < 10.0.20348.5386, < 10.0.26100.33158
수정 버전 Microsoft Windows 10 Version 1607, Windows 10 Version 1809, Windows Server 2012 10.0.14393.9339, 10.0.17763.9020, 10.0.20348.5386, 10.0.26100.33158
영향 여부, 우선 대응, 정식 해결과 결과 확인 절차를 요약합니다.
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
조치 기한: 2026.07.28Microsoft Windows 10 Version 1607, Windows 10 Version 1809, Windows Server 2012의 현재 전체 버전이 공식 영향 범위(Microsoft Windows 10 Version 1607, Windows 10 Version 1809, Windows Server 2012 >= 10.0.14393.0 < 10.0.14393.9339, >= 10.0.17763.0 < 10.0.17763.9020, >= 6.2.9200.0 < 6.2.9200.26226, >= 6.3.9600.0 < 6.3.9600.23291, >= 10.0.20348.0 < 10.0.20348.5386, >= 10.0.26100.0 < 10.0.26100.33158, < 10.0.14393.9339, < 10.0.17763.9020, r2, < 10.0.20348.5386, < 10.0.26100.33158)에 포함되는지 확인합니다. OS를 선택하면 해당 OS의 제품·패키지·KB·APAR 확인 명령만 표시됩니다.
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
패치 후 같은 명령으로 전체 버전을 다시 확인해 Microsoft Windows 10 Version 1607, Windows 10 Version 1809, Windows Server 2012 10.0.14393.9339, 10.0.17763.9020, 10.0.20348.5386, 10.0.26100.33158 기준을 충족하는지 확인합니다. 이어서 유형 미확정 관련 오류·공격 흔적이 새로 발생하지 않는지 확인합니다.
CVSS 벡터 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE CWE-1220
KEV 등록일 2026.07.14
랜섬웨어 캠페인 사용 미확인
CISA 비고 https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2026-56155 ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2026-56155