PT-2026-47966 · Microsoft · Sharepoint Server

CVE-2026-45484 · Published 2026-06-09 · Updated 2026-07-27

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 Office SharePoint (affected versions not specified)

Description Deserialization of untrusted data allows an authorized attacker to elevate privileges over a network, which can subsequently affect the system. Deserialization is the process of converting a data stream back into an object.

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

DoS

Deserialization of Untrusted Data

Weakness Enumeration

CWE-502

Related Identifiers

BDU:2026-08225

CVE-2026-45484

Affected Products

Sharepoint Server

References · 7

• https://safe-surf.ru/specialists/bulletins-nkcki/733227 · Security Note
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45484 · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-08225 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-45484 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-45484 · Security Note
• https://t.me/cveNotify/167217 · Telegram Post
• https://t.me/CSIRT_italia/3809 · Telegram Post