PT-2025-36863 · Microsoft · Sharepoint Server

Zcgonvhs Cat Vanilla · Published 2025-09-09 · Updated 2026-06-08 · CVE-2025-54897

Positive Technologies (AI Summary)

CVSS v2.0

9.0

High

Base vector

AV:N/AC:L/Au:S/C:C/I:C/A:C

Name of the Vulnerable Software and Affected Versions Microsoft SharePoint Server (affected versions not specified) Microsoft SharePoint Server Subscription Edition (affected versions not specified) Microsoft SharePoint Enterprise Server (affected versions not specified)

Description An issue exists in the deserialization mechanism of Microsoft Office SharePoint. Deserialization is the process of converting a stream of bytes back into an object. This flaw allows an authorized attacker to execute arbitrary code remotely over a network by providing untrusted data.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

DoS

RCE

Deserialization of Untrusted Data

Weakness Enumeration

CWE-502

Related Identifiers

BDU:2025-11034

CVE-2025-54897

Affected Products

Sharepoint Server

References · 11

• https://osv.dev/vulnerability/CVE-2025-54897 · Vendor Advisory
• https://bdu.fstec.ru/vul/2025-11034 · Security Note
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-54897 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-54897 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2025-54897 · Security Note
• https://t.me/cveNotify/135299 · Telegram Post
• https://twitter.com/CVEnew/status/1965557748696797477 · Twitter Post
• https://t.me/CSIRT_italia/3601 · Telegram Post
• https://twitter.com/feedly/status/1965530239875870796 · Twitter Post
• https://twitter.com/threatngsec/status/1969161587916144898 · Twitter Post
• https://t.me/avleonovcom/1583 · Telegram Post