CVE-2026-20963

EUVD-2026-2114
Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
8.8 HIGH
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
microsoftCNA
8.8 HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Base Score
CVSS 3.x
EPSS Score
Percentile: 81%
Affected Products (NVD)
VendorProductVersion
microsoftsharepoint_server
𝑥
< 16.0.19127.20442
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20963