critical9.8Known exploited
CVE-2025-26399
SolarWinds Web Help Desk Deserialization of Untrusted Data Vulnerability
Exploited in the wild
This vulnerability is on the CISA Known Exploited Vulnerabilities list, added 2026-03-09. Federal due date: 2026-03-12.
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Impact
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.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Solarwinds | Web Help Desk | through 12.8.6 Version 12.8.7 |
Weakness classification
References
- NVD record
- CVE.org record
- CISA KEV catalog
- https://documentation.solarwinds.com/en/success_center/whd/content/release_notes/whd_12-8-7-hotfix-1_release_notes.htm
- https://www.solarwinds.com/trust-center/security-advisories/CVE-2025-26399
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-26399
- https://www.microsoft.com/en-us/security/blog/2026/02/06/active-exploitation-solarwinds-web-help-desk/