[ CVE-2026-18556 · Published 1 Aug 2026 ]
N-able N-central Authentication Bypass Using an Alternate Path or Channel Vulnerability
[ Why it matters ]Priority signals
- Exploited in the wild: on CISA's Known Exploited Vulnerabilities list since 2026-08-04
[ Description ]Official description
Authentication bypass using an alternate path or channel vulnerability in N-able N-central allows Authentication Bypass. This issue affects N-central: through 2026.1.
CISA: N-able N-central contains an authentication bypass using an alternate path or channel that allows for authentication bypass.
[ Fixes ]Fixes and patches
CISA required action (US federal deadline 7 Aug 2026): 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.
No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.
[ References ]References
- uptime.n-able.comVendor Advisory
- www.cisa.gov/known-exploited-vulnerabilities-catalogUS Government Resource
- www.n-able.com/blog/n-central-security-update-august-2-2026Vendor Advisory