{"schema":"threatline.record/2","record":{"id":"CVE-2026-18577","aliases":[],"summary":"N-able N-central Authentication Bypass Using an Alternate Path or Channel Vulnerability","details":"N-able N-central contains an authentication bypass using an alternate path or channel allows for authentication bypass and account takeover in N-central. This vulnerability is the result of an incomplete patch for CVE-2026-18556.","categories":["Applications & CMS"],"product":"N-central","vendor":"N-able","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-18577","source_modified_at":"2026-08-04T13:32:51.312Z","fetched_at":"2026-10-23T18:42:43.628194Z","product":"N-central","vendor":"N-able","versions":[{"lessThanOrEqual":"2026.3","status":"affected","version":"0","versionType":"custom"},{"status":"unaffected","version":"2026.3.1.7","versionType":"custom"}],"defaultStatus":"unaffected"}],"fixed_versions":[],"cvss":8.2,"severity":"High","kev":{"listed":true,"date_added":"2026-08-03","due_date":"2026-08-06","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.","ransomware_campaign_use":"Unknown","forensic_triage":true},"epss":{"probability":0.14622,"percentile":0.96656,"score_date":"2026-10-23"},"published_at":"2026-08-02T22:06:18.296Z","modified_at":"2026-08-04T13:32:51.312Z","provenance":[{"source":"CISA KEV","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23T17:00:09.9001Z"},{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-18577","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-08-04T13:32:51.312Z"},{"source":"Nuclei","url":"https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-18577.yaml","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":null},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-18577","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CISA KEV","CVE List","Nuclei","EPSS"],"references":[{"source":"CVE List","url":"https://documentation.n-able.com/N-central/Release_Notes/GA/Content/N-central_2026.3_HF1_Release_Notes.htm"},{"source":"CVE List","url":"https://status.n-able.com/2026/08/02/n-central-2026-3-hotfix-1-mitigation-for-cve-2026-18577/"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-18577","source":"CISA KEV"},{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-18556"},{"source":"CVE List","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-18577","tags":["government-resource"]},{"source":"CVE List","url":"https://www.n-able.com/blog/n-central-security-update-august-2-2026","tags":["vendor-advisory"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"active","automatable":"yes","technical_impact":"total","assessed_at":"2026-08-04T03:56:18.454615Z"},"exploits":[{"kind":"Scanner template","name":"N-able N-central < 2026.3.1.10 - Authentication Bypass","source":"Nuclei","url":"https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-18577.yaml"}],"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-08-04T13:32:51.312Z","content_hash":"7f891c6afd93e86ce2ba8df6fc68b896c61a3e19aa18c5f2f3fdf4cc2b987fe6"}}