CVE-2026-18577

Incomplete patch leads to administrative account takeover

An incomplete patch for CVE-2026-18556 allows for authentication bypass and account takeover in N-central Versions through 2026.3.1

Affected

N-able · N-central

CVSS v4.0 CNA

8.2 HIGHCVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:L/SI:L/SA:L/E:A/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS v3.1 NVD

8.1 HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

14.62% chance of exploitation in the next 30 days, 97th percentile

CISA KEV

added 2026-08-03

Nuclei

critical · CWE-288

Published

2026-08-02

Updated

2026-08-04

Proof-of-concept exploits (1)

• HORKimhab/CVE-2026-185770★ · 2026-08-04

Nuclei templates (1)

• projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-18577.yaml

Security advisories

• https://www.n-able.com/blog/n-central-security-update-august-2-2026
• https://documentation.n-able.com/N-central/Release_Notes/GA/Content/N-central_2026.3_HF1_…
• https://status.n-able.com/2026/08/02/n-central-2026-3-hotfix-1-mitigation-for-cve-2026-18…

References

• CVE Record
• NVD entry