N-able · N-central
CVE-2026-18577
Incomplete patch leads to administrative account takeover
What it is
An incomplete patch for CVE-2026-18556 allows for authentication bypass and account takeover in N-central Versions through 2026.3.1
CISA: N-able N-central contains an authentication bypass using an alternate path or channel allows for authentication bypass and account takeover in N-central. This vulnerability is the result of an incomplete patch for CVE-2026-18556.
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.
Deadline for US federal agencies: August 6, 2026
More exploited flaws from N-able
| Added | Vulnerability | Product | Severity | Attack chance |
|---|---|---|---|---|
| Sep 8, 2026 | Static Code Injection | N-central | Critical 10.0 | 15% |
| Aug 4, 2026 | Authentication Bypass Using an Alternate Path or Channel | N-central | High 8.2 | 7.9% |
| Aug 13, 2025 | Insecure Deserialization | N-Central | Critical 9.4 | 1.9% |
| Aug 13, 2025 | Command Injection | N-Central | Critical 9.4 | 3.4% |
Sources: Known Exploited Vulnerabilities (CISA, public domain), CVE records (cve.org) and EPSS (FIRST). The chance of attacks is the EPSS estimate that someone will try to exploit the flaw in the next 30 days.