CVE-2026-18577

Analyzed
Published: 02 Aug 2026, 22:06
Last modified:04 Aug 2026, 13:32

Vulnerability Summary

Overall Risk (default)
medium
34/100
CVSS Score
8.2 HIGH
v4.0 (cve.org)
EPSS Score
4.1% LOW
4% probability 0.00%
KEV
Listed
CISA
1 listing
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

02 Aug 2026, 22:06
Published
Vulnerability first disclosed
03 Aug 2026, 00:00
Added to CISA KEV
N-able N-central Authentication Bypass Using an Alternate Path or Channel Vulnerability
04 Aug 2026, 13:32
Last Modified
Vulnerability information updated
06 Aug 2026, 00:00
CISA Remediation Due
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.

Description

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

CVSS Metrics

  • v4.0•HIGH•Score: 8.2CVSS: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
  • v4.0•HIGH•Score: 8.2CVSS: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
  • v3.1•HIGH•Score: 8.1CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Trends

Current EPSS score: 4.10%• Percentile: 90%

Techniques & Countermeasures

  • CWE-288•Authentication Bypass Using an Alternate Path or Channel

    The product requires authentication, but the product has an alternate path or channel that does not require authentication.

Affected Systems

  • n-able•n-central

    ≤ 2026.3 | < 2026.3 | 2026.3

References (5)