What is CVE-2026-18577?
An incomplete patch for CVE-2026-18556 allows for authentication bypass and account takeover in N-central Versions through 2026.3.1
Timeline
- 2026-08-02Published to the U.S. National Vulnerability Database (NVD)
- 2026-08-03Added to the CISA Known Exploited Vulnerabilities (KEV) catalog
- 2026-08-03NVD record last updated
- 2026-08-04First covered in a defend.network daily briefing
- 2026-08-06CISA federal remediation deadline (BOD 22-01)
CISA Known Exploited Vulnerability
N-able N-central Authentication Bypass Using an Alternate Path or Channel Vulnerability
Affected product
N-Able N-Central
Remediation Steps
- Apply the vendor patch released by N-able to resolve the authentication bypass
- Verify patching on both hosted and on-premises N-central server deployments
- Review server access logs for evidence of unauthorized administrative access
- Reset credentials for all administrative accounts as a precaution
- Monitor for further exploitation vectors
References
- https://documentation.n-able.com/N-central/Release_Notes/GA/Content/N-central_2026.3_HF1_Release_Notes.htm
- https://status.n-able.com/2026/08/02/n-central-2026-3-hotfix-1-mitigation-for-cve-2026-18577/
- https://www.cve.org/CVERecord?id=CVE-2026-18556
- https://nvd.nist.gov/vuln/detail/CVE-2026-18577
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog
Referenced in our briefings & reports
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🤖 This CVE page is generated by defend.network from NVD, CISA KEV, EPSS, and our verified daily briefings. Severity and exploitation data come from official sources; always verify remediation steps against the official vendor advisory before acting in production.