CVE-2025-53770 (GCVE-0-2025-53770)
Vulnerability from cvelistv5
Published
2025-07-20 01:06
Modified
2025-08-18 17:51
Severity ?
9.8 (Critical) - 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
CWE
  • CWE-502 - Deserialization of Untrusted Data
Summary
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.
References
secure@microsoft.com https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-53770 Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108 https://arstechnica.com/security/2025/07/sharepoint-vulnerability-with-9-8-severity-rating-is-under-exploit-across-the-globe/ Exploit, Press/Media Coverage
af854a3a-2127-422b-91ae-364da2661108 https://github.com/kaizensecurity/CVE-2025-53770 Exploit
af854a3a-2127-422b-91ae-364da2661108 https://msrc.microsoft.com/blog/2025/07/customer-guidance-for-sharepoint-vulnerability-cve-2025-53770/ Mitigation, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108 https://news.ycombinator.com/item?id=44629710 Issue Tracking
af854a3a-2127-422b-91ae-364da2661108 https://research.eye.security/sharepoint-under-siege/ Exploit, Mitigation, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 https://therecord.media/microsoft-sharepoint-zero-day-vulnerability-exploited-globally Press/Media Coverage
af854a3a-2127-422b-91ae-364da2661108 https://www.bleepingcomputer.com/news/microsoft/microsoft-sharepoint-zero-day-exploited-in-rce-attacks-no-patch-available/ Press/Media Coverage
af854a3a-2127-422b-91ae-364da2661108 https://www.cisa.gov/news-events/alerts/2025/07/20/microsoft-releases-guidance-exploitation-sharepoint-vulnerability-cve-2025-53770 Mailing List, Third Party Advisory, US Government Resource
af854a3a-2127-422b-91ae-364da2661108 https://www.darkreading.com/remote-workforce/microsoft-rushes-emergency-fix-exploited-sharepoint-toolshell-flaw Press/Media Coverage
af854a3a-2127-422b-91ae-364da2661108 https://www.forbes.com/sites/daveywinder/2025/07/20/microsoft-confirms-ongoing-mass-sharepoint-attack---no-patch-available/ Press/Media Coverage
af854a3a-2127-422b-91ae-364da2661108 https://x.com/Shadowserver/status/1946900837306868163 Third Party Advisory
Impacted products
Vendor Product Version
Microsoft Microsoft SharePoint Enterprise Server 2016 Version: 16.0.0   < 16.0.5513.1001
 Create a notification for this product.
CISA Known exploited vulnerability
Data from the Known Exploited Vulnerabilities Catalog

Date added: 2025-07-20

Due date: 2025-07-21

Required action: 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.

Used in ransomware: Known

Notes: 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

Show details on NVD website

To clipboard 

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