{"id":"CVE-2025-26399","url":"https://www.cyber-defence.io/tools/cve/CVE-2025-26399","generatedAt":"2026-10-31T06:59:16.528Z","title":"SolarWinds Web Help Desk Deserialization of Untrusted Data 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.","published":"2025-09-23T05:15:36.000Z","lastModified":"2026-10-11T20:10:00.000Z","status":"Analyzed","sourceIdentifier":"psirt@solarwinds.com","cvss":{"version":"3.1","score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-502"],"affected":["solarwinds/web help desk"],"epss":{"score":0.9012,"percentile":0.99795,"date":"2026-10-30","history":[]},"kev":{"listed":true,"dateAdded":"2026-03-09","dueDate":"2026-03-12","knownRansomwareCampaignUse":"Known","notes":"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.\nhttps://www.solarwinds.com/trust-center/security-advisories/cve-2025-26399 ; https://documentation.solarwinds.com/en/success_center/whd/content/release_notes/whd_12-8-7-hotfix-1_release_notes.htm ; https://nvd.nist.gov/vuln/detail/CVE-2025-26399"},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"urgent","text":"Known to be exploited in the wild (CISA KEV, CISA remediation deadline 12 March 2026). Treat as an emergency change: patch or isolate now, then hunt for prior compromise."},"changes":[],"references":[{"url":"https://documentation.solarwinds.com/en/success_center/whd/content/release_notes/whd_12-8-7-hotfix-1_release_notes.htm","tags":["Release Notes"],"source":"psirt@solarwinds.com"},{"url":"https://www.solarwinds.com/trust-center/security-advisories/CVE-2025-26399","tags":["Patch","Vendor Advisory"],"source":"psirt@solarwinds.com"},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-26399","tags":["US Government Resource"],"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"},{"url":"https://www.microsoft.com/en-us/security/blog/2026/02/06/active-exploitation-solarwinds-web-help-desk/","tags":["Third Party Advisory"],"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2025-26399","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}