Vulnerability Report

CVE-2026-18577

CISA KEV Active

Title: N-central authentication bypass and account takeover

Auth Bypass

Proof Of Concept

PoC Available for CVE-2026-18577

CWE Category CWE-288

Published Date Aug 02, 2026

Modified Date Aug 04, 2026

Exploit Status Available

Score 8.2 CVSS v4.0

Exploit Probability (EPSS)

4.10%

Vulnerability Summary

CVE-2026-18577: An incomplete patch for CVE-2026-18556 allows for authentication bypass and account takeover in N-central Versions through 2026.3.1

Impacted Vendors

n-able 1

Reference Links

https://documentation.n-able.com/N-central/Release_Notes/GA/Content/N-central_2026.3_HF1_Release_Notes.htm https://status.n-able.com/2026/08/02/n-central-2026-3-hotfix-1-mitigation-for-cve-2026-18577/ https://www.cve.org/CVERecord?id=CVE-2026-18556

CVSS v4.0

Source Entity a5532a13-c4dd-4202-bef1-e0b8f2f8d12b

Severity HIGH

8.2

Attack Vector

NETWORK

Complexity

HIGH

Privileges

N/A

Interaction

NONE

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

N/A

RAW VECTOR

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

CVSS v3.1

Source Entity [email protected]

Severity HIGH

8.1

Attack Vector

NETWORK

Complexity

HIGH

Privileges

N/A

Interaction

NONE

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

UNCHANGED

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

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2026-18577 Exploits & PoCs (Proof Of Concept)

GitHub https://github.com/HORKimhab/CVE-2026-18577

View Code

GitHub https://github.com/CreamyG31337/ncentral-compromise-ioc-triage

View Code

August 04, 2026 MODIFIED