CVE-2026-18577
- EPSS 4.1%
- Published 02.08.2026 22:06:18
- Last modified 04.08.2026 14:27:12
- CVE watchlists
- Open
LoginIncomplete 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
03.08.2026: CISA Known Exploited Vulnerabilities (KEV) Catalog
N-able N-central Authentication Bypass Using an Alternate Path or Channel Vulnerability
VulnerabilityN-able N-central contains an authentication bypass using an alternate path or channel allows for authentication bypass and account takeover in N-central. This vulnerability is the result of an incomplete patch for CVE-2026-18556.
DescriptionApply 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.
Required actions| Type | Source | Score | Percentile |
|---|---|---|---|
| EPSS | FIRST.org | 4.1% | 0.898 |
| Source | Base Score | Exploit Score | Impact Score | Vector string |
|---|---|---|---|---|
| NIST | 8.1 | 2.2 | 5.9 |
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
|
| a5532a13-c4dd-4202-bef1-e0b8f2f8d12b | 8.2 | 0 | 0 |
CVSS: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
|
The product requires authentication, but the product has an alternate path or channel that does not require authentication.