
CVE-2026-62911 Microsoft Exchange Pre-Auth RCE: Patch Now
CVE-2026-62911 PoC chains NTLM relay to Exchange MRSProxy to drop ASPX webshells as SYSTEM. Apply August 2026 update before mass exploitation begins.
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2 results tagged webshell

CVE-2026-62911 PoC chains NTLM relay to Exchange MRSProxy to drop ASPX webshells as SYSTEM. Apply August 2026 update before mass exploitation begins.

CVE-2021-40539 is a critical authentication bypass and remote code execution vulnerability in ManageEngine ADSelfService Plus (versions before build 6114), patched in September 2021. The flaw allowed unauthenticated attackers to access protected REST API endpoints and upload a JSP webshell, achieving code execution on the server. APT41 and at least two other threat actor clusters exploited it against U.S. defense contractors, academic institutions, and critical infrastructure. CVSS 9.8.