HIGHVulnerability
Verified
Global

CISA KEV: Microsoft SharePoint — Microsoft SharePoint Weak Authentication Vulnerability

·Source: CISA KEV

Updated:

Executive Summary

Microsoft SharePoint contains a weak authentication vulnerability which allows an unauthorized attacker to bypass a security feature over a network.

Analysis

Microsoft SharePoint contains a weak authentication vulnerability which allows an unauthorized attacker to bypass a security feature over a network. Added to CISA Known Exploited Vulnerabilities catalog on 2026-08-18. Remediation due: 2026-08-21.

Indicators of Compromise (1)

CVE (1)
CVE-2026-55040
NVDMITRE CVE
Source Attribution

Originally published by CISA KEV on Aug 18, 2026. Verified by: CISA.

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