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 2026-08-03. 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-2026-18577
HighCVSS 8.1KEVExploitation Probability (EPSS)
High risk83th percentile - higher than 83% of all known CVEs
Summary
An incomplete patch for CVE-2026-18556 allows authentication bypass and account takeover in N-central versions up to 2026.3.1.
Risk Assessment
An attacker can gain unauthorized access to user accounts, leading to a breach of confidentiality and integrity of data managed by N-central.
Recommendation
Immediately update N-central to a version later than 2026.3.1 that includes the complete fix for this vulnerability.
Original NVD description (English source)
An incomplete patch for CVE-2026-18556 allows for authentication bypass and account takeover in N-central Versions through 2026.3.1