최우선 대응긴급CISA KEV · 실제 악용 확인

CVE-2025-53770

Microsoft SharePoint Deserialization of Untrusted Data Vulnerability

대응 우선순위: 최우선
CVSS: 9.8
EPSS: 100.0%
CISA KEV: 등록
조치 기한: 2025.07.21
공개일: 2025.07.20

최우선 대응 판단

CISA KEV에 등록된 실제 악용 확인 취약점

실제 악용확인

EPSS100.0%

EPSS 백분위100.0%

설명

Deserialization of untrusted data in on-premises Microsoft SharePoint Server allows an unauthorized attacker to execute code over a network. Microsoft is aware that an exploit for CVE-2025-53770 exists in the wild. Microsoft is preparing and fully testing a comprehensive update to address this vulnerability. In the meantime, please make sure that the mitigation provided in this CVE documentation is in place so that you are protected from exploitation.

영향 제품·버전

공급사 Microsoft

제품 SharePoint

영향 버전 16.0.0, < 16.0.18526.20508, 2016, 2019

수정 버전 16.0.18526.20508

조치 방법

CISA 공식 요구조치

Disconnect public-facing versions of SharePoint Server that have reached their end-of-life (EOL) or end-of-service (EOS) to include SharePoint Server 2013 and earlier versions. For supported versions, please follow the mitigations according to CISA (URL listed below in Notes) and vendor instructions (URL listed below in Notes). Adhere to the applicable BOD 22-01 guidance for cloud services or discontinue use of the product if mitigations are not available.

조치 기한: 2025.07.21

공급사가 제공한 최신 보안 업데이트 적용
자사 보유 제품과 영향 버전의 일치 여부 확인
외부 노출 서비스와 비정상 인증·접속 로그 점검
패치가 어려우면 공급사 완화조치와 접근통제 적용

기술 정보

CVSS 벡터 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CWE CWE-502

KEV 등록일 2025.07.20

랜섬웨어 캠페인 사용 확인됨

CISA 비고 CISA Mitigation Instructions: https://www.cisa.gov/news-events/alerts/2025/07/20/microsoft-releases-guidance-exploitation-sharepoint-vulnerability-cve-2025-53770; https://www.microsoft.com/en-us/security/blog/2025/07/22/disrupting-active-exploitation-of-on-premises-sharepoint-vulnerabilities/ ; https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-53770 ; https://nvd.nist.gov/vuln/detail/CVE-2025-53770

EPSS 데이터 기준일 2026.06.27

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