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CVE-2026-18556: N-able N-central Authentication Bypass Using an Alternate Path or Channel Vulnerability
N-able N-central · in CISA KEV since 2026-08-04
2026-08-04added to KEV
2026-08-07federal remediation due date
40.16%EPSS exploit probability (30 days) 98.6th percentile
8.2 HIGHCVSS 4.0
Unknownknown ransomware use
3days from NVD publication to KEV
What it is
N-able N-central contains an authentication bypass using an alternate path or channel that allows for authentication bypass.
Required action (CISA)
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.
| CWE | CWE-288 |
|---|---|
| CVSS vector | CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/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 |
| NVD published | 2026-08-01 (Analyzed) |
Original records: NVD · CISA KEV · JSON: /api/cve/CVE-2026-18556.json · all KEV CVEs
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Get the full file: Exploited Vulnerabilities Brief – September 2026 ($29): this month's KEV additions ranked by EPSS, ransomware use and due date, ready to hand to a patch team. Checkout by Polar.
Get the full file: Exploited Vulnerabilities Brief – September 2026 ($29): this month's KEV additions ranked by EPSS, ransomware use and due date, ready to hand to a patch team. Checkout by Polar.