{"schema":"threatline.record/2","record":{"id":"CVE-2026-18556","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 that allows for authentication bypass.","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-2026-18556","source_modified_at":"2026-08-05T03:56:07.447Z","fetched_at":"2026-10-23T18:42:43.628194Z","product":"N-central","vendor":"N-able","versions":[{"lessThanOrEqual":"2026.1","status":"affected","version":"0","versionType":"custom"}],"defaultStatus":"unaffected"}],"fixed_versions":[],"cvss":8.2,"severity":"High","kev":{"listed":true,"date_added":"2026-08-04","due_date":"2026-08-07","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":0.07882,"percentile":0.94705,"score_date":"2026-10-23"},"published_at":"2026-08-01T19:59:30.913Z","modified_at":"2026-08-05T03:56:07.447Z","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-2026-18556","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-08-05T03:56:07.447Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-18556","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CISA KEV","CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://uptime.n-able.com/"},{"url":"https://status.n-able.com/2026/08/02/n-central-2026-3-hotfix-1-mitigation-for-cve-2026-18577/","source":"CISA KEV"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-18556","source":"CISA KEV"},{"source":"CVE List","url":"https://www.n-able.com/blog/n-central-security-update-august-2-2026","tags":["vendor-advisory"]},{"source":"CVE List","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-18556","tags":["government-resource"]}],"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":"2026-08-04T00:00:00+00:00"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-08-05T03:56:07.447Z","content_hash":"eb1ee2d71a5ac62937783568015bd93459a7892dc188bff302d44d234331d5c1"}}