CVE-2025-53770 Technical Vulnerability Analysis & Patch Advisory (CVSS 9.8)
Executive & SecOps Summary
SECOPS ASSESSMENTSystems running unpatched versions impacted by CVE-2025-53770
Deserialization of untrusted data in on-premises Microsoft SharePoint Server allows an unauthorized attacker to execute code over a network....
Apply vendor security patches and restrict external network exposure.
Affected Products & Version Scope
Remediation & Live Workaround Commands
PATCH & WORKAROUNDRemediation Steps
- Upgrade to the latest patched release from the vendor.
- Apply virtual patching or network segmentation until maintenance windows allow full patching.
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Technical Root Cause & Exploitation Mechanics
Technical Overview
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.
- CVSS Score: 9.8 (CRITICAL)
- CWE IDs: CWE-502
Official Vendor Advisories & References
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.
Frequently Asked SecOps Questions (CVE-2025-53770)
FAQQ1. How critical is CVE-2025-53770 and is it actively exploited in the wild?
CVE-2025-53770 is rated CVSS 9.8 (CRITICAL) with a 30-day EPSS exploitation probability of 100.0%. It is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, requiring immediate emergency remediation.
Q2. Which vendors and products are affected by CVE-2025-53770?
Primary impacted vendors include security-advisory across enterprise-software. Scope summary: All unpatched versions listed in the official NVD CPE configurations
Q3. What temporary mitigations or workarounds exist for CVE-2025-53770 before patching?
[Mitigation] Apply vendor security patches and restrict external network exposure. Follow the CLI remediation commands and interactive SecOps checklist on this page to restrict exposure prior to your maintenance window.
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