CVE-2026-64901CWE-502insecure-deserialization

CVE-2026-64901

High · published August 11, 2026

CVSS v3.1
8.8
EPSS
2%
Percentile
81.0
In the wild
Unconfirmed
What it is

Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.

The record
Technical detail
CVSS v3.1
8.8 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.02044 · 81.0th percentile
Weakness
CWE-502 · Deserialization of Untrusted Data
Published
2026-08-11T21:18Z
Affected products (3)
ProductVersionsFixed in
microsoft/sharepoint_server< 16.0.19725.2052216.0.19725.20522
microsoft/sharepoint_serverall versions—
microsoft/sharepoint_serverall versions—
References (1)
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-64901 · [email protected]
EPSS history
Timeline
  • 11 AUG 17:06Z
    Microsoft SharePoint Server Remote Code Execution Vulnerability
    cvelistv5