March 9, 2026 · Applied Cybernetics Group
CVE-2025-26399 — SolarWinds Web Help Desk
known ransomware use
SolarWinds Web Help Desk Deserialization of Untrusted Data Vulnerability
- Added to KEV
2026-03-09- Federal due date
2026-03-12- Vendor
- SolarWinds
- Product
- Web Help Desk
- EPSS
- 99.8th percentile (score 0.895, as of
2026-09-16) - NVD CVSS v3.1
- —
- Ransomware use
- Known
- Upstream
- https://nvd.nist.gov/vuln/detail/CVE-2025-26399
CISA short 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
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.