CVE-2026-20958

Microsoft SharePoint Information Disclosure Vulnerability

State: Published
Severity: 5.4 Medium
Published: Jan 13, 2026
Updated: Jul 30, 2026
Reserved: Dec 4, 2025

Description

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

Scores

CVSS	Score	Vector	Source
3.1	5.4 Medium	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C	microsoft

Weaknesses

CWE-918 Server-Side Request Forgery (SSRF)

Affected Products

Product	Versions
Microsoft SharePoint Enterprise Server 2016Microsoft	16.0.0 to before 16.0.5535.1001Affected
Microsoft SharePoint Server 2019Microsoft	16.0.0 to before 16.0.10417.20083Affected
Microsoft SharePoint Server Subscription EditionMicrosoft	16.0.0 to before 16.0.19127.20442Affected

References

Microsoft SharePoint Information Disclosure Vulnerabilityvendor-advisorypatch

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