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

CVSS v3 8.1 HIGH

8.1^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.2 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://documentation.n-able.com/N-central/Release_Notes/GA/Content/N-central_2026.3_HF1_Release_Notes.htm	Patch Release Notes
https://status.n-able.com/2026/08/02/n-central-2026-3-hotfix-1-mitigation-for-cve-2026-18577/	Release Notes
https://www.cve.org/CVERecord?id=CVE-2026-18556	VDB Entry
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-18577	US Government Resource
https://www.n-able.com/blog/n-central-security-update-august-2-2026	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:n-able:n-central::::::::
	cpe:2.3:a:n-able:n-central:2026.3:-::::::

History

23 Oct 2026, 22:10

Type	Values Removed	Values Added
Summary		(es) Un parche incompleto para CVE-2026-18556 permite la omisión de autenticación y la toma de control de cuentas en las versiones de N-central hasta la 2026.3.1.

Information

Published : 2026-08-02 23:16

Updated : 2026-10-23 22:10

NVD link : CVE-2026-18577

Mitre link : CVE-2026-18577

CVE.ORG link : CVE-2026-18577

JSON object : View

Products Affected

n-able

n-central

CWE

CWE-288

Authentication Bypass Using an Alternate Path or Channel

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"modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED"}}]}, "affected": [{"source": "a5532a13-c4dd-4202-bef1-e0b8f2f8d12b", "affectedData": [{"vendor": "N-able", "product": "N-central", "versions": [{"status": "affected", "version": "0", "versionType": "custom", "lessThanOrEqual": "2026.3"}, {"status": "unaffected", "version": "2026.3.1.7", "versionType": "custom"}], "defaultStatus": "unaffected"}]}], "published": "2026-08-02T23:16:26.210", "references": [{"url": "https://documentation.n-able.com/N-central/Release_Notes/GA/Content/N-central_2026.3_HF1_Release_Notes.htm", "tags": ["Patch", "Release Notes"], "source": "a5532a13-c4dd-4202-bef1-e0b8f2f8d12b"}, {"url": "https://status.n-able.com/2026/08/02/n-central-2026-3-hotfix-1-mitigation-for-cve-2026-18577/", "tags": ["Release Notes"], "source": "a5532a13-c4dd-4202-bef1-e0b8f2f8d12b"}, {"url": "https://www.cve.org/CVERecord?id=CVE-2026-18556", "tags": ["VDB Entry"], "source": "a5532a13-c4dd-4202-bef1-e0b8f2f8d12b"}, {"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-18577", "tags": ["US Government Resource"], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}, {"url": "https://www.n-able.com/blog/n-central-security-update-august-2-2026", "tags": ["Vendor Advisory"], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "a5532a13-c4dd-4202-bef1-e0b8f2f8d12b", "description": [{"lang": "en", "value": "CWE-288"}]}], "descriptions": [{"lang": "en", "value": "An incomplete patch for CVE-2026-18556 allows for authentication bypass and account takeover in N-central Versions through 2026.3.1"}, {"lang": "es", "value": "Un parche incompleto para CVE-2026-18556 permite la omisi\u00f3n de autenticaci\u00f3n y la toma de control de cuentas en las versiones de N-central hasta la 2026.3.1."}], "lastModified": "2026-10-23T22:10:00.160", "cisaActionDue": "2026-08-06", "cisaExploitAdd": "2026-08-03", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:n-able:n-central:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "6CEC2750-AFFB-40A4-97E0-88BDAC106F5E", "versionEndExcluding": "2026.3"}, {"criteria": "cpe:2.3:a:n-able:n-central:2026.3:-:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "EB21160B-DDC4-4F70-A703-E313DED8CAF2"}], "operator": "OR"}]}], "sourceIdentifier": "a5532a13-c4dd-4202-bef1-e0b8f2f8d12b", "cisaRequiredAction": "Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA\u2019s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA\u2019s \u201cForensics Triage Requirements\u201d (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.", "cisaVulnerabilityName": "N-able N-central Authentication Bypass Using an Alternate Path or Channel Vulnerability"}