N-able N-central versions through 2026.3.1 contain an authentication bypass that lets a remote unauthenticated attacker take over an administrator account and gain full control of the N-central server. CVE-2026-18577 is a bypass of the incomplete fix for CVE-2026-18556, so the 2026.3.1 Hotfix 1 build (2026.3.1.7) does not fully remediate it. Hotfix 2 (2026.3.1.10) supersedes Hotfix 1 and is the first fully fixed 2026.3 build.
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