{"id":"CVE-2026-18577","aliases":["EUVD-2026-52010","GHSA-qgcm-97x5-6q8q"],"status":"published","title":"Incomplete patch leads to administrative account takeover","description":"An incomplete patch for CVE-2026-18556 allows for authentication bypass and account takeover in N-central Versions through 2026.3.1","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:L/SI:L/SA:L/E:A","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.14622,"percentile":0.96698,"model":"v2026.06.15"},"facts":{"in_kev":true,"known_exploited":true,"public_exploit":true,"fix_available":false},"cwes":["CWE-288"],"published":"2026-08-02T22:06:18Z","modified":"2026-10-23T22:10:00Z","kev":{"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.","known_ransomware_use":"Unknown"},"exploitation":[{"source":"euvd","since":"2026-08-03"},{"source":"kev","since":"2026-08-03"}],"exploits":[{"source":"pocgithub","id":"HORKimhab/CVE-2026-18577","title":"HORKimhab/CVE-2026-18577","date":"2026-08-04","url":"https://github.com/HORKimhab/CVE-2026-18577"},{"source":"nuclei","id":"CVE-2026-18577","title":"N-able N-central \u003c 2026.3.1.10 - Authentication Bypass","type":"detection template","url":"https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-18577.yaml"}],"products":[{"vendor":"n-able","product":"n-central"}],"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"]},{"url":"https://status.n-able.com/2026/08/02/n-central-2026-3-hotfix-1-mitigation-for-cve-2026-18577/","tags":["Release Notes"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-18556","tags":["VDB Entry"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-18577","tags":["government-resource","US Government Resource"]},{"url":"https://www.n-able.com/blog/n-central-security-update-august-2-2026","tags":["vendor-advisory","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-18577"},{"url":"https://status.n-able.com/2026/08/02/n-central-2026-3-hotfix-1-mitigation-for-cve-2026-18577"},{"url":"https://github.com/advisories/GHSA-qgcm-97x5-6q8q"}],"sources":{"cve":[{"id":"CVE-2026-18577","title":"Incomplete patch leads to administrative account takeover","description":"An incomplete patch for CVE-2026-18556 allows for authentication bypass and account takeover in N-central Versions through 2026.3.1","status":"published","published":"2026-08-02T22:06:18.296Z","modified":"2026-08-04T13:32:51.312Z","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:L/SI:L/SA:L/E:A","level":"high","assessor":"cna"}],"cwes":["CWE-288"],"updated_at":"2026-11-02T14:20:12.260247Z"}],"euvd":[{"id":"EUVD-2026-52010","description":"An incomplete patch for CVE-2026-18556 allows for authentication bypass and account takeover in N-central Versions through 2026.3.1","status":"published","published":"2026-08-02T22:06:18Z","modified":"2026-08-04T13:32:51Z","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:L/SI:L/SA:L/E:A","level":"high"}],"exploited_since":"2026-08-03","updated_at":"2026-11-02T18:02:23.332335Z"}],"ghsa":[{"id":"GHSA-qgcm-97x5-6q8q","title":"An incomplete patch for CVE-2026-18556 allows for authentication bypass and account takeover in N...","description":"An incomplete patch for CVE-2026-18556 allows for authentication bypass and account takeover in N-central Versions through 2026.3.1","status":"published","published":"2026-08-03T00:30:28Z","modified":"2026-08-04T15:33:20Z","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:L/SI:L/SA:L/E:A/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":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-288"],"updated_at":"2026-11-02T15:10:05.423688Z"}],"kev":[{"id":"CVE-2026-18577","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 allows for authentication bypass and account takeover in N-central. This vulnerability is the result of an incomplete patch for CVE-2026-18556.","cwes":["CWE-288"],"kev":{"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.","known_ransomware_use":"Unknown"},"updated_at":"2026-11-02T17:00:15.999436Z"}],"nvd":[{"id":"CVE-2026-18577","description":"An incomplete patch for CVE-2026-18556 allows for authentication bypass and account takeover in N-central Versions through 2026.3.1","status":"published","published":"2026-08-02T23:16:26.21Z","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:L/SI:L/SA:L/E:A/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":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"}],"cwes":["CWE-288"],"updated_at":"2026-11-02T14:12:34.290716Z"}]}}