CVE-2026-18577
high CISA KEVN-able N-central Authentication Bypass Using an Alternate Path or Channel Vulnerability
Vendor / product: N-able — N-central
An incomplete patch for CVE-2026-18556 allows for authentication bypass and account takeover in N-central Versions through 2026.3.1
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H Required action (CISA)
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.
Affected products
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
References
- https://documentation.n-able.com/N-central/Release_Notes/GA/Content/N-central_2026.3_HF1_R... a5532a13-c4dd-4202-bef1-e0b8f2f8d12b
- https://status.n-able.com/2026/08/02/n-central-2026-3-hotfix-1-mitigation-for-cve-2026-185... a5532a13-c4dd-4202-bef1-e0b8f2f8d12b
- https://www.cve.org/CVERecord?id=CVE-2026-18556 a5532a13-c4dd-4202-bef1-e0b8f2f8d12b
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-18577 134c704f-9b21-4f2e-91b3-4a467353bcc0
- https://www.n-able.com/blog/n-central-security-update-august-2-2026 134c704f-9b21-4f2e-91b3-4a467353bcc0