{"schema":"threatline.record/2","record":{"id":"CVE-2025-26399","aliases":[],"summary":"SolarWinds Web Help Desk Deserialization of Untrusted Data Vulnerability","details":"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.","categories":["Applications & CMS"],"product":"Web Help Desk","vendor":"SolarWinds","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2025-26399","source_modified_at":"2026-08-04T03:55:57.668Z","fetched_at":"2026-10-23T18:42:43.628194Z","product":"Web Help Desk","vendor":"SolarWinds","versions":[{"status":"affected","version":"12.8.7 and below"}],"defaultStatus":"unaffected"}],"fixed_versions":[],"cvss":9.8,"severity":"Critical","kev":{"listed":true,"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.","ransomware_campaign_use":"Known"},"epss":{"probability":0.9012,"percentile":0.99799,"score_date":"2026-10-23"},"published_at":"2025-09-23T05:07:14.702Z","modified_at":"2026-08-04T03:55:57.668Z","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-2025-26399","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-08-04T03:55:57.668Z"},{"source":"Nuclei","url":"https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2025/CVE-2025-26399.yaml","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":null},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2025-26399","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CISA KEV","CVE List","Nuclei","EPSS"],"references":[{"url":"https://www.solarwinds.com/trust-center/security-advisories/cve-2025-26399","source":"CISA KEV"},{"source":"CVE List","url":"https://documentation.solarwinds.com/en/success_center/whd/content/release_notes/whd_12-8-7-hotfix-1_release_notes.htm"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-26399","source":"CISA KEV"},{"source":"CVE List","url":"https://www.solarwinds.com/trust-center/security-advisories/CVE-2025-26399"},{"source":"CVE List","url":"https://www.microsoft.com/en-us/security/blog/2026/02/06/active-exploitation-solarwinds-web-help-desk/","tags":["third-party-advisory"]},{"source":"CVE List","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-26399","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":"2025-09-23T00:00:00+00:00"},"exploits":[{"source":"Nuclei","kind":"Scanner template","name":"SolarWinds Web Help Desk < 12.8.7 - AjaxProxy Deserialization RCE","url":"https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2025/CVE-2025-26399.yaml"}],"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-08-04T03:55:57.668Z","content_hash":"6815bb17e4f89291280a0180929373642b5d777e03352447de4048ea3cee0752"}}