Connect your agent
AdvisoriesCriticalCheck your lockfilePluginHow it worksPricing Connect your agent

CVE record · CVE-2026-20963

Microsoft SharePoint Remote Code Execution Vulnerability

CVSS 9.8 CriticalCriticalIn CISA KEVEPSS 0.29 · 98th percentile

Critical, because:

  • In CISA’s KEV catalogue since 18 Mar 2026: it is known to be exploited.
  • CVSS score 9.8: 9.0 or more.
  • CVSS score 9.8 (7.0 or more) and EPSS 0.29 (0.1 or more): a high score and a real chance of exploitation in the next 30 days.

How we decide what’s critical

Published by the CVE Program (CNA: microsoft) at 13 Jan 2026, 17:56 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
VendorProductVersions
Microsoft Microsoft SharePoint Enterprise Server 2016
  • affected 16.0.0 to before 16.0.5535.1001 custom
Microsoft Microsoft SharePoint Server 2019
  • affected 16.0.0 to before 16.0.10417.20083 custom
Microsoft Microsoft SharePoint Server Subscription Edition
  • affected 16.0.0 to before 16.0.19127.20442 custom
Identifiers
CVE-2026-20963
CNA
microsoft
Weakness (CWE)
CWE-502
Tags
Published
13 Jan 2026
Updated
30 Jul 2026

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

ScoreRatingCVSSVectorSource
9.8 Critical 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C CNA (microsoft)
  • CISA KEV Listed since 18 Mar 2026: known to be exploited.
  • EPSS 0.29, the 98th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 13 Jan 2026. New records show when each source confirmed them.

Sources

References from the CNA

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.