N-able N-central Authentication Bypass Using an Alternate Path or Channel
What to do
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
CISA deadline 2026-08-07 · passed 34 days ago · applies to US federal civilian agencies; used elsewhere as a reference SLA
What happened
N-able N-central contains an authentication bypass using an alternate path or channel that allows for authentication bypass.
Who is affected
N-able N-central. Affected version ranges are listed in the vendor advisory and the NVD entry linked under Sources.
Weakness class: CWE-288.
Timeline
- Added to CISA KEVExploitation in the wild confirmed by CISA
- CISA remediation deadlinepassed 34 days ago
Sources
- NVD entry for CVE-2026-18556 nvd.nist.gov/vuln/detail/CVE-2026-18556
- CISA Known Exploited Vulnerabilities catalog www.cisa.gov/known-exploited-vulnerabilities-catalog
- uptime.n-able.com uptime.n-able.com/
- status.n-able.com status.n-able.com/2026/08/02/n-central-2026-3-hotfix-1-mitigation-for-cve-2026-18577/
- cisa.gov www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk
- cisa.gov www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk
- nvd.nist.gov nvd.nist.gov/vuln/detail/CVE-2026-18556