SharePoint vulnerability CVE-2026-55040 is now being exploited in the wild, with the attacks starting shortly after the release of a PoC

CISA confirmed today that ransomware gangs have begun abusing a high-severity Microsoft SharePoint remote code execution vulnerability, which has been flagged as actively…

SharePoint CVE-2026-55040 lets unauthenticated attackers impersonate users and chain with CVE-2026-63520 for code execution