N-able N-central Authentication Bypass Using an Alternate Path or Channel Vulnerability

HIGH 8.1EXPLOITED (CISA KEV)CVE-2026-18577 · Published 02/08/2026 · updated 23/10/2026

N-able N-central Authentication Bypass Using an Alternate Path or Channel Vulnerability. Actively exploited: CISA added this vulnerability to its Known Exploited Vulnerabilities catalog on 03/08/2026. Patch affected systems as an emergency.

Package	Affected versions	Patched versions
n-central n-able	`= 2026.3< 2026.3`	`2026.3`

Description

An incomplete patch for CVE-2026-18556 allows for authentication bypass and account takeover in N-central Versions through 2026.3.1

References

documentation.n-able.com/N-central/Release_Notes/GA/Content/N-central_2026.3_HF1_Release_Notes.htm · Patch
status.n-able.com/2026/08/02/n-central-2026-3-hotfix-1-mitigation-for-cve-2026-18577 · Release Notes
cve.org/CVERecord · VDB Entry
cisa.gov/known-exploited-vulnerabilities-catalog · US Government Resource
n-able.com/blog/n-central-security-update-august-2-2026 · Vendor Advisory
CISA KEV · CVE-2026-18577

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