KNOWN EXPLOITED VULNERABILITY DOSSIER
CVE-2026-55040
Microsoft · SharePoint
Microsoft SharePoint contains a weak authentication vulnerability which allows an unauthorized attacker to bypass a security feature over a network.
Correlated Federal Court Cases & Exploitation Context (0)
No federal court indictment in the current archive directly cites CVE-2026-55040. This record tracks its addition to the CISA Known Exploited Vulnerabilities (KEV) catalog on 2026-08-18.
Associated Government Advisories
Tracked under CISA Known Exploited Vulnerabilities Binding Operational Directive 22-01 for federal civilian agency remediation.