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Attackers Exploit SharePoint Authentication Bypass After Public PoC Release



August 13, 2026 at 11:39AM

Threat actors have begun to exploit a newly disclosed Microsoft SharePoint vulnerability following the release of a proof-of-concept (PoC) code. The vulnerability in question is CVE-2026-55040 (CVSS score: 9.1), which refers to a critical security feature bypass that stems from weak authentication. It was patched by Microsoft as part of its July 2026 Patch Tuesday updates. "The authentication

from The Hacker News https://ift.tt/L0OtZwk

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