CVE-2026-63520CWE-20

CVE-2026-63520

High · published August 11, 2026

CVSS v3.1
8.1
EPSS
1%
Percentile
61.0
In the wild
Unconfirmed
What it is

Improper input validation in Microsoft Office SharePoint allows an unauthorized attacker to execute code over a network.

The record
Technical detail
CVSS v3.1
8.1 · HIGH
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00956 · 61.0th percentile
Weakness
CWE-20 · Improper Input Validation
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-2026-63520 · [email protected]
EPSS history
Timeline
  • 11 AUG 17:03Z
    Microsoft SharePoint Server Remote Code Execution Vulnerability
    cvelistv5