CVE entry · CVE-2026-18556
CVE-2026-18556: N-able N-central Authentication Bypass Using an Alternate Path or Channel Vulnerability
N-able N-central contains an authentication bypass using an alternate path or channel that allows for authentication bypass.
- Actively exploited: added to CISA’s KEV catalog on August 4, 2026.
- Use by ransomware: not established so far.
- Remediation deadline for US federal agencies: August 7, 2026.
Description from CISA’s KEV catalog.
What to do
- Check whether your estate includes N-able N-central, including internet-facing devices.
- Apply the vendor’s patch or mitigations (references below). Failing that, isolate the product or stop using it, as CISA requires of US federal agencies.
- An exploited vulnerability has often been used before it was fixed: look for signs of compromise, especially on internet-facing devices.
References
- Vendor advisory or reference cited by CISA (uptime.n-able.com)
- Vendor advisory or reference cited by CISA (status.n-able.com)
- NVD entry (NIST)
- CISA KEV catalog