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CVE-2025-53770

CRITICALCISA KEV

9.8

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.

Details CVE

Score CVSS v3.19.8

SeveriteCRITICAL

Vecteur CVSSCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Vecteur d'attaqueNETWORK

ComplexiteLOW

Privileges requisNONE

Interaction utilisateurNONE

Publie7/20/2025

Derniere modification10/27/2025

Sourcekev

Observations honeypot0

CISA KEV

FournisseurMicrosoft

ProduitSharePoint

Nom vulnerabiliteMicrosoft SharePoint Deserialization of Untrusted Data Vulnerability

Date ajout KEV2025-07-20

Date limite remediation2025-07-21

Utilise dans ransomwareKnown

Produits affectes

microsoft:sharepoint_server

Faiblesses (CWE)

CWE-502

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-53770(secure@microsoft.com)

https://arstechnica.com/security/2025/07/sharepoint-vulnerability-with-9-8-severity-rating-is-under-exploit-across-the-globe/(af854a3a-2127-422b-91ae-364da2661108)

https://github.com/kaizensecurity/CVE-2025-53770(af854a3a-2127-422b-91ae-364da2661108)

https://msrc.microsoft.com/blog/2025/07/customer-guidance-for-sharepoint-vulnerability-cve-2025-53770/(af854a3a-2127-422b-91ae-364da2661108)

https://news.ycombinator.com/item?id=44629710(af854a3a-2127-422b-91ae-364da2661108)

https://research.eye.security/sharepoint-under-siege/(af854a3a-2127-422b-91ae-364da2661108)

https://therecord.media/microsoft-sharepoint-zero-day-vulnerability-exploited-globally(af854a3a-2127-422b-91ae-364da2661108)

https://www.bleepingcomputer.com/news/microsoft/microsoft-sharepoint-zero-day-exploited-in-rce-attacks-no-patch-available/(af854a3a-2127-422b-91ae-364da2661108)

https://www.cisa.gov/news-events/alerts/2025/07/20/microsoft-releases-guidance-exploitation-sharepoint-vulnerability-cve-2025-53770(af854a3a-2127-422b-91ae-364da2661108)

https://www.darkreading.com/remote-workforce/microsoft-rushes-emergency-fix-exploited-sharepoint-toolshell-flaw(af854a3a-2127-422b-91ae-364da2661108)

https://www.forbes.com/sites/daveywinder/2025/07/20/microsoft-confirms-ongoing-mass-sharepoint-attack---no-patch-available/(af854a3a-2127-422b-91ae-364da2661108)

https://x.com/Shadowserver/status/1946900837306868163(af854a3a-2127-422b-91ae-364da2661108)

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-53770(134c704f-9b21-4f2e-91b3-4a467353bcc0)

Correlations IOC

Aucune correlation enregistree

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