{"id":"CVE-2025-26399","aliases":["EUVD-2025-30842","GHSA-vfrj-f292-3f24"],"status":"published","title":"SolarWinds Web Help Desk Deserialization of Untrusted Data Privilege Escalation Vulnerability","description":"SolarWinds Web Help Desk was found to be susceptible to an unauthenticated AjaxProxy deserialization remote code execution vulnerability that, if exploited, would allow an attacker to run commands on the host machine. This vulnerability is a patch bypass of CVE-2024-28988, which in turn is a patch bypass of CVE-2024-28986.","severity":{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.90564,"percentile":0.99805,"model":"v2026.06.15"},"facts":{"in_kev":true,"known_exploited":true,"public_exploit":true,"fix_available":false},"cwes":["CWE-502"],"published":"2025-09-23T05:07:14Z","modified":"2026-10-11T20:10:00Z","kev":{"date_added":"2026-03-09","due_date":"2026-03-12","required_action":"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.","known_ransomware_use":"Known"},"exploitation":[{"source":"euvd","since":"2026-03-09"},{"source":"kev","since":"2026-03-09"}],"exploits":[{"source":"pocgithub","id":"rxerium/CVE-2025-26399","title":"rxerium/CVE-2025-26399","date":"2025-09-23","url":"https://github.com/rxerium/CVE-2025-26399"},{"source":"nuclei","id":"CVE-2025-26399","title":"SolarWinds Web Help Desk \u003c 12.8.7 - AjaxProxy Deserialization RCE","type":"detection template","url":"https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2025/CVE-2025-26399.yaml"}],"products":[{"vendor":"solarwinds","product":"web help desk"},{"vendor":"solarwinds","product":"web_help_desk"}],"references":[{"url":"https://www.solarwinds.com/trust-center/security-advisories/CVE-2025-26399","tags":["Patch","Vendor Advisory"]},{"url":"https://documentation.solarwinds.com/en/success_center/whd/content/release_notes/whd_12-8-7-hotfix-1_release_notes.htm","tags":["Release Notes"]},{"url":"https://www.microsoft.com/en-us/security/blog/2026/02/06/active-exploitation-solarwinds-web-help-desk/","tags":["third-party-advisory","Third Party Advisory"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-26399","tags":["government-resource","US Government Resource"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-26399"},{"url":"https://www.microsoft.com/en-us/security/blog/2026/02/06/active-exploitation-solarwinds-web-help-desk"},{"url":"https://github.com/advisories/GHSA-vfrj-f292-3f24"}],"sources":{"cve":[{"id":"CVE-2025-26399","title":"SolarWinds Web Help Desk Deserialization of Untrusted Data Privilege Escalation Vulnerability","description":"SolarWinds Web Help Desk was found to be susceptible to an unauthenticated AjaxProxy deserialization remote code execution vulnerability that, if exploited, would allow an attacker to run commands on the host machine. This vulnerability is a patch bypass of CVE-2024-28988, which in turn is a patch bypass of CVE-2024-28986.","status":"published","published":"2025-09-23T05:07:14.702Z","modified":"2026-08-04T03:55:57.668Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"cna"}],"cwes":["CWE-502"],"updated_at":"2026-11-02T14:32:27.932735Z"}],"euvd":[{"id":"EUVD-2025-30842","description":"SolarWinds Web Help Desk was found to be susceptible to an unauthenticated AjaxProxy deserialization remote code execution vulnerability that, if exploited, would allow an attacker to run commands on the host machine. This vulnerability is a patch bypass of CVE-2024-28988, which in turn is a patch bypass of CVE-2024-28986.","status":"published","published":"2025-09-23T05:07:14Z","modified":"2026-08-04T03:55:57Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"exploited_since":"2026-03-09","updated_at":"2026-11-02T18:02:23.332335Z"}],"ghsa":[{"id":"GHSA-vfrj-f292-3f24","title":"SolarWinds Web Help Desk was found to be susceptible to an unauthenticated AjaxProxy...","description":"SolarWinds Web Help Desk was found to be susceptible to an unauthenticated AjaxProxy deserialization remote code execution vulnerability that, if exploited, would allow an attacker to run commands on the host machine. This vulnerability is a patch bypass of CVE-2024-28988, which in turn is a patch bypass of CVE-2024-28986.","status":"published","published":"2025-09-23T06:30:27Z","modified":"2026-03-09T21:31:33Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-502"],"updated_at":"2026-11-02T15:06:31.484049Z"}],"kev":[{"id":"CVE-2025-26399","title":"SolarWinds Web Help Desk Deserialization of Untrusted Data Vulnerability","description":"SolarWinds Web Help Desk contain a deserialization of untrusted data vulnerability in AjaxProxy that could allow an attacker to run commands on the host machine.","cwes":["CWE-502"],"kev":{"date_added":"2026-03-09","due_date":"2026-03-12","required_action":"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.","known_ransomware_use":"Known"},"updated_at":"2026-11-02T17:00:15.999436Z"}],"nvd":[{"id":"CVE-2025-26399","description":"SolarWinds Web Help Desk was found to be susceptible to an unauthenticated AjaxProxy deserialization remote code execution vulnerability that, if exploited, would allow an attacker to run commands on the host machine. This vulnerability is a patch bypass of CVE-2024-28988, which in turn is a patch bypass of CVE-2024-28986.","status":"published","published":"2025-09-23T05:15:35.777Z","modified":"2026-10-11T20:10:00.2Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"secondary"},{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary"}],"cwes":["CWE-502"],"updated_at":"2026-11-02T14:11:32.559087Z"}]}}