CVE-2026-20958

Microsoft SharePoint Information Disclosure Vulnerability

CVE-2026-20958 is fixed in 3 products on 1 platform, first by KB5002828, released January 13, 2026. It is not reported as exploited. Patch Radar priority: Routine.

Routine

CVSS

5.4

Important

Exploitation

None reported

Exploitation Less Likely

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0035

28th percentile

<p>Server-side request forgery (ssrf) in Microsoft Office SharePoint allows an authorized attacker to disclose information over a network.</p>

Where it's fixed

Product	Fix	Released
Microsoft
Microsoft SharePoint Enterprise Server 2016	KB5002828	Jan 13, 2026
Microsoft SharePoint Server 2019	KB5002825	Jan 13, 2026
Microsoft SharePoint Server Subscription Edition	KB5002822	Jan 13, 2026

Details

Published
January 14, 2026
Weakness
Server-Side Request Forgery (SSRF)
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20958

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