Vulnerability in N-Able N-Central
CVE-2026-18556
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.
EPSS: 0.402 (98.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.4 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N.
Affected products
- N-able N-central — versions 0
Weakness classification (CWE)
CISA KEV (Known Exploited Vulnerabilities)
This CVE is on the CISA KEV catalog, added on . CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.
BOD 22-01 due date: .
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.
Public proof-of-concept exploits
References
- a5532a13-c4dd-4202-bef1-e0b8f2f8d12b (Vendor Advisory)
- 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Vendor Advisory)
- 134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)
Frequently asked questions
- What is CVE-2026-18556?
- CVE-2026-18556 is a high-severity vulnerability in N-Able N-Central, classified under Authentication Bypass Using an Alternate Path or Channel. CVSS score: 7.4/10. Published 2026-08-01.
- How severe is CVE-2026-18556?
- High severity. CVSS v3 base score is 7.4 out of 10.
- Is CVE-2026-18556 known to be exploited?
- Yes. CVE-2026-18556 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2026-08-04), indicating it is being actively exploited. 1 public proof-of-concept repositories are indexed.