CVE-2026-18556Unauthenticated administrative account takeover

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.

8.2 HIGHEPSS 7.88%⚡ Known Exploited (CISA KEV)NVD: Analyzed

Last updated: 2026-10-23 22:10 UTC

OverviewCVSS details

8.2HIGHCVSS 4.0

Score source: N-able (CNA)
NVD status: Analyzed
Published: Aug 1, 2026
Assigner: N-able

Affected

N-central (N-able)

Versions: through 2026.1

Exploitation

Public exploit: None listed
CISA KEV: Listed · Aug 4, 2026
KEV due date: Aug 7, 2026
Ransomware use: Unknown
SSVC: Exploitation active · Automatable yes · Impact total

EPSS · FIRST, scored Nov 7

7.88%chance of exploitation in 30 days

Higher than 94.74% of CVEs

CVSS 4.0 · N-able (CNA)

8.2High

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

Attack vector: Network
Attack complexity: High
Attack requirements: None
Privileges required: None
User interaction: None
Confidentiality impact: High
Integrity impact: None
Availability impact: None
Confidentiality (other systems): None
Integrity (other systems): None
Availability (other systems): None

CVSS 3.1 · NVD

7.4High

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

Attack vector: Network
Attack complexity: High
Privileges required: None
User interaction: None
Scope: Unchanged
Confidentiality impact: High
Integrity impact: High
Availability impact: None

NVD status: Analyzed

Overview Affected Products References

NVD CVE.org

Overview

Severity

Score	Severity	Version	Vector String
8.2	HIGH	4.0N-able (CNA)	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
7.4	HIGH	3.1NVD	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

CISA required action

⚡ Known exploited · remediation due Aug 7, 2026

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.

Details

CVE ID: CVE-2026-18556
Status: Analyzed
Assigner (CNA): N-able
Published: Aug 1, 2026
Last modified: 2026-10-23 22:10 UTC
Weaknesses: CWE-288 · Authentication bypass using an alternate path or channel

Sources

Refreshed hourly from the sources above. Last fetched 2026-11-08 08:21 UTC.