MSRXCVE-2026-18556
CVE-2026-18556
N-able N-central Authentication Bypass Using an Alternate Path or Channel Vulnerability
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.
CVSS 4.0 · CNA
chance of exploitation in the next 30 days (EPSS; higher than 94% of CVEs)
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.
Scores
Affected products
- n-able n-central: ≤ 2026.1
Weakness: CWE-288
3 references (advisories, patches, write-ups)
- https://uptime.n-able.com/ · Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-18556 · US Government Resource
- https://www.n-able.com/blog/n-central-security-update-august-2-2026 · Vendor Advisory
Sources: NVD, CVE.org, FIRST EPSS. Missing ones did not answer or have no record yet.