CVE-2026-20963

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-20963
Deserialization of untrusted data in Microsoft Office SharePoint allows an unauthorized attacker to execute code over a network.

9.8 /10

CVSS v3 : CRITICAL

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20963 Vendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-20963 US Government Resource
Configurations

Configuration 1 (hide)

OR cpe:2.3:a:microsoft:sharepoint_server:*:*:*:*:subscription:*:*:*
cpe:2.3:a:microsoft:sharepoint_server:2016:*:*:*:enterprise:*:*:*
cpe:2.3:a:microsoft:sharepoint_server:2019:*:*:*:*:*:*:*
History

01 Apr 2026, 14:16

Type Values Removed Values Added
CVSS v2 : unknown
v3 : 8.8 		v2 : unknown
v3 : 9.8
Summary
  • (es) La deserialización de datos no confiables en Microsoft Office SharePoint permite a un atacante autorizado ejecutar código a través de una red.
Summary (en) Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to execute code over a network. (en) Deserialization of untrusted data in Microsoft Office SharePoint allows an unauthorized attacker to execute code over a network.

19 Mar 2026, 13:09

Type Values Removed Values Added
References () https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-20963 - () https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-20963 - US Government Resource

18 Mar 2026, 20:16

Type Values Removed Values Added
References
  • () https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-20963 -

14 Jan 2026, 19:17

Type Values Removed Values Added
CPE cpe:2.3:a:microsoft:sharepoint_server:2016:*:*:*:enterprise:*:*:*
cpe:2.3:a:microsoft:sharepoint_server:2019:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:sharepoint_server:*:*:*:*:subscription:*:*:*
References () https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20963 - () https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20963 - Vendor Advisory
First Time Microsoft
Microsoft sharepoint Server

13 Jan 2026, 18:16

Type Values Removed Values Added
New CVE
Information

Published : 2026-01-13 18:16

Updated : 2026-04-01 16:01

NVD link : CVE-2026-20963

Mitre link : CVE-2026-20963

CVE.ORG link : CVE-2026-20963

JSON object : View

Products Affected

microsoft

  • sharepoint_server
CWE
CWE-502

Deserialization of Untrusted Data