{"cvss":9.1,"datePublished":"2026-08-12T00:00:00Z","dateUpdated":"2026-08-12T00:00:00Z","description":"Microsoft SharePoint contains a weak authentication vulnerability which allows an unauthorized attacker to bypass a security feature over a network.","dueDate":"2026-08-21T00:00:00Z","id":"CVE-2026-55040","kev_catalogs":["vulncheck"],"knownRansomwareCampaignUse":"Unknown","product":"SharePoint","requiredAction":"Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.","severity":"CRITICAL","source":"vulncheck_kev","title":"Microsoft SharePoint Weak Authentication Vulnerability","vendor":"Microsoft"}