CVE-2026-18556

HighActively exploited (CISA KEV)

Description

Authentication bypass using an alternate path or channel vulnerability in N-able N-central allows Authentication Bypass. This issue affects N-central: through 2026.1.

SeverityHigh
CVSS7.4
Exploit probability—
ProductN-able N-central
PublishedAug 1, 2026
First seenAug 1, 2026
Added to KEVAug 4, 2026
Weakness typeCWE-288CWE-288

How to fix

CISA required action

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.

CISA due date: Aug 7, 2026

Affected products

ProductAffected versionsFixed in
n-able n-centralv ≤ 2026.1—

Check your version

Choose the product and enter the version you run to see whether it falls in the affected range.

In the Intelligence 360 plan

Attack Surface Management

See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.