CVE-2025-26399
SolarWinds Web Help Desk Deserialization of Untrusted Data Vulnerability
9.8
CVSS 3.1
89.5 %
EPSS (current)
2026-03-09
KEV addition
Yes
Ransomware
Timeline
Publication, first public exploit and KEV addition on a day axis.
Key facts
Vendor / product: SolarWinds / Web Help Desk
Published: 2025-09-23 · Due (CISA): 2026-03-12
CWE: CWE-502 · EU list: no
Exploit references (metadata only)
| Source | Reference | Title | Date |
|---|---|---|---|
| nuclei | http/cves/2025/CVE-2025-26399.yaml | SolarWinds Web Help Desk < 12.8.7 - AjaxProxy Deserialization RCE | – |
References only — no downloads or instructions.