Actively exploited in the wild
N-able N-central Authentication Bypass Using an Alternate Path or Channel Vulnerability
N-able - N-central · Listed in the CISA KEV since 2026-08-04. This indicates confirmed attacks in production environments.
Required action: 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.
CVE-2026-18556
HighCVSS 7.4KEVExploitation Probability (EPSS)
Low risk19th percentile - higher than 19% of all known CVEs
Summary
Authentication bypass using an alternate path or channel vulnerability in N-able N-central through version 2026.1 allows authentication bypass.
Risk Assessment
An unauthenticated attacker can gain access to the system without proper authentication, potentially leading to full compromise.
Recommendation
Apply security patches provided by N-able.
Original NVD description (English source)
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.