{"id":"CVE-2026-18556","aliases":["EUVD-2026-51918","GHSA-fffv-7w63-p3xw"],"status":"published","title":"Unauthenticated administrative account takeover","description":"Authentication bypass using an alternate path or channel vulnerability in N-able N-central allows Authentication Bypass.\n\nThis issue affects N-central: through 2026.1.","severity":{"version":"4.0","score":8.2,"vector":"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","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.43884,"percentile":0.98767,"model":"v2026.06.15"},"facts":{"in_kev":true,"known_exploited":true,"public_exploit":true,"fix_available":false},"cwes":["CWE-288"],"published":"2026-08-01T19:59:30Z","modified":"2026-10-23T22:10:00Z","kev":{"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.","known_ransomware_use":"Unknown"},"exploitation":[{"source":"euvd","since":"2026-08-04"},{"source":"kev","since":"2026-08-04"}],"exploits":[{"source":"pocgithub","id":"CreamyG31337/ncentral-compromise-ioc-triage","title":"CreamyG31337/ncentral-compromise-ioc-triage","date":"2026-08-06","url":"https://github.com/CreamyG31337/ncentral-compromise-ioc-triage"}],"products":[{"vendor":"n-able","product":"n-central"}],"references":[{"url":"https://uptime.n-able.com/","tags":["Vendor Advisory"]},{"url":"https://www.n-able.com/blog/n-central-security-update-august-2-2026","tags":["vendor-advisory","Vendor Advisory"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-18556","tags":["government-resource","US Government Resource"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-18556"},{"url":"https://uptime.n-able.com"},{"url":"https://github.com/advisories/GHSA-fffv-7w63-p3xw"}],"sources":{"cve":[{"id":"CVE-2026-18556","title":"Unauthenticated administrative account takeover","description":"Authentication bypass using an alternate path or channel vulnerability in N-able N-central allows Authentication Bypass.\n\nThis issue affects N-central: through 2026.1.","status":"published","published":"2026-08-01T19:59:30.913Z","modified":"2026-08-05T03:56:07.447Z","cvss":[{"version":"4.0","score":8.2,"vector":"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","level":"high","assessor":"cna"}],"cwes":["CWE-288"],"updated_at":"2026-11-02T14:20:12.260247Z"}],"euvd":[{"id":"EUVD-2026-51918","description":"Authentication bypass using an alternate path or channel vulnerability in N-able N-central allows Authentication Bypass.\n\nThis issue affects N-central: through 2026.1.","status":"published","published":"2026-08-01T19:59:30Z","modified":"2026-08-05T03:56:07Z","cvss":[{"version":"4.0","score":8.2,"vector":"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","level":"high"}],"exploited_since":"2026-08-04","updated_at":"2026-11-02T18:02:22.516769Z"}],"ghsa":[{"id":"GHSA-fffv-7w63-p3xw","title":"Authentication bypass using an alternate path or channel vulnerability in N-able N-central allows...","description":"Authentication bypass using an alternate path or channel vulnerability in N-able N-central allows Authentication Bypass.\n\nThis issue affects N-central: through 2026.1.","status":"published","published":"2026-08-01T21:31:27Z","modified":"2026-08-04T21:30:26Z","cvss":[{"version":"4.0","score":8.2,"vector":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high"},{"version":"3.1","score":7.4,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"high"}],"cwes":["CWE-288"],"updated_at":"2026-11-02T15:10:06.083807Z"}],"kev":[{"id":"CVE-2026-18556","title":"N-able N-central Authentication Bypass Using an Alternate Path or Channel Vulnerability","description":"N-able N-central contains an authentication bypass using an alternate path or channel that allows for authentication bypass.","cwes":["CWE-288"],"kev":{"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.","known_ransomware_use":"Unknown"},"updated_at":"2026-11-02T17:00:15.999436Z"}],"nvd":[{"id":"CVE-2026-18556","description":"Authentication bypass using an alternate path or channel vulnerability in N-able N-central allows Authentication Bypass.\n\nThis issue affects N-central: through 2026.1.","status":"published","published":"2026-08-01T20:16:37.157Z","modified":"2026-10-23T22:10:00.16Z","cvss":[{"version":"4.0","score":8.2,"vector":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high","assessor":"secondary"},{"version":"3.1","score":7.4,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"high","assessor":"primary"}],"cwes":["CWE-288"],"updated_at":"2026-11-02T14:12:34.290716Z"}]}}