CVE-2025-26399 — SolarWinds Web Help Desk Deserialization of Untrusted Data Vulnerability
CVE-2025-26399: SolarWinds Web Help Desk Deserialization of Untrusted Data Vulnerability
CISA Known Exploited Vulnerability (KEV)
| Vendor / project | SolarWinds |
| Product | Web Help Desk |
| Date added | 2026-03-09 |
| Due date | 2026-03-12 |
| Ransomware campaign use | Known |
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.
Required action (CISA)
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Notes
https://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
References
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-26399
- KEV catalog: https://www.cisa.gov/known-exploited-vulnerabilities-catalog