CVE-2026-40368CWE-502

Microsoft SharePoint Server Remote Code Execution Vulnerability

High · published May 12, 2026

CVSS v3.1
8.0
EPSS
2%
Percentile
81.8
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
8.0 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
CVSS v4.0
Not supplied
EPSS
0.02126 · 81.8th percentile
Weakness
CWE-502 · Deserialization of Untrusted Data
Published
2026-05-12T16:58Z
EPSS history
Timeline
  • 12 MAY 16:58Z
    Microsoft SharePoint Server Remote Code Execution Vulnerability
    cvelistv5