CVE-2025-53770
Microsoft SharePoint Server Remote Code Execution Vulnerability
At a glance
- Severity
- CRITICAL 9.8
- Exploitation
- Known exploited (CISA KEV) · added 2025-07-20
Exploited per ENISA since 2025-07-20 - EPSS
- EPSS 100.00 % · percentile 100 (2026-10-27)
- State
- PUBLISHED
- Published
- Updated
- Assigner
- microsoft
- NVD status
- Analyzed
Description
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.
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | CRITICAL 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:F/RL:W/RC:C | microsoft |
| CVSS 3.1 | CRITICAL 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | NVD · secure@microsoft.com (Secondary) |
Weaknesses (CWE)
European references
- ENISA EUVD · EUVD-2025-23309
- GCVE · GCVE-0-2025-53770
CERT-FR advisories
- CERTFR-2025-AVI-0611 — Multiples vulnérabilités dans les produits Microsoft · cert.ssi.gouv.fr
- CERTFR-2025-ALE-010 — [MàJ] Multiples vulnérabilités dans Microsoft SharePoint · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:a:microsoft:sharepoint_server:*:*:*:*:subscription:*:*:*< 16.0.18526.20508cpe:2.3:a:microsoft:sharepoint_server:2016:*:*:*:enterprise:*:*:*cpe:2.3:a:microsoft:sharepoint_server:2019:*:*:*:*:*:*:*
Affected products
| Product | Versions |
|---|---|
| Microsoft · Microsoft SharePoint Enterprise Server 2016 | affected 16.0.0 < 16.0.5513.1001 |
| Microsoft · Microsoft SharePoint Server 2019 | affected 16.0.0 < 16.0.10417.20037 |
| Microsoft · Microsoft SharePoint Server Subscription Edition | affected 16.0.0 < 16.0.18526.20508 |
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-53770
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-53770
- https://msrc.microsoft.com/blog/2025/07/customer-guidance-for-sharepoint-vulnerability-cve-2025-53770/
- https://www.cisa.gov/news-events/alerts/2025/07/20/microsoft-releases-guidance-exploitation-sharepoint-vulnerability-cve-2025-53770
- https://research.eye.security/sharepoint-under-siege/
- https://www.bleepingcomputer.com/news/microsoft/microsoft-sharepoint-zero-day-exploited-in-rce-attacks-no-patch-available/
- https://www.forbes.com/sites/daveywinder/2025/07/20/microsoft-confirms-ongoing-mass-sharepoint-attack---no-patch-available/
- https://x.com/Shadowserver/status/1946900837306868163
- https://github.com/kaizensecurity/CVE-2025-53770
- https://therecord.media/microsoft-sharepoint-zero-day-vulnerability-exploited-globally
- https://news.ycombinator.com/item?id=44629710
- https://arstechnica.com/security/2025/07/sharepoint-vulnerability-with-9-8-severity-rating-is-under-exploit-across-the-globe/
- https://www.darkreading.com/remote-workforce/microsoft-rushes-emergency-fix-exploited-sharepoint-toolshell-flaw
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| CISA Known Exploited Vulnerabilities | CC0 1.0 |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |