CVE-2026-18556: N-Able N-Central

What is 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.

CVSS7.4 NVD 3.1

SeverityHIGH

Exploitation In the wild In CISA KEV

EPSS<1% · P40

Triage statusActive Exploit

ActionPatch immediately

CVSS vectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

NVD published2026-08-01

NVD last modified2026-08-05

Timeline

2026-08-01Published to the U.S. National Vulnerability Database (NVD)
2026-08-04Added to the CISA Known Exploited Vulnerabilities (KEV) catalog
2026-08-05NVD record last updated
2026-08-06First covered in a defend.network daily briefing
2026-08-07CISA federal remediation deadline (BOD 22-01)

CISA Known Exploited Vulnerability

N-able N-central Authentication Bypass Using an Alternate Path or Channel Vulnerability

Added to KEV2026-08-04

Federal patch deadline2026-08-07

Known ransomware useUnknown

Affected product

N-Able N-Central

Remediation Steps

Apply the vendor security update for N-Able N-Central as a priority.
Restrict network exposure of the affected service to trusted sources until patched.
Review logs and detections for indicators of exploitation.
Confirm fixed versions against the official vendor advisory before deploying.

References

Referenced in our briefings & reports

Vulnerability Priority Report – Week 2 of August 2026 (August 10 – 16)
Vulnerability Priority Report – Week 1 of August 2026 (August 3 – 9)
Linux KVM escape, Cisco SD-WAN patches, Spectre v2 defenses bypassed (2026-08-07)
IBM Langflow, Apache Tomcat, N-able RCE and auth bypass actively exploited (2026-08-06)

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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.