Web Help Desk
CVE-2025-26399: SolarWinds Web Help Desk Deserialization of Untrusted Data Privilege Escalation Vulnerability
SolarWinds Web Help Desk was found to be susceptible to an unauthenticated AjaxProxy deserialization remote code execution vulnerability that, if exploited, would allow an attacker to run commands on the host machine.
Published
Automatic summary from the vendor's CVE record. We haven't written a full analysis of this vulnerability yet.
Affected and fixed versions
| Product / branch | Fixed in |
|---|---|
| Web Help Desk 12.8 | See the advisory |
Always confirm against the vendor advisory, which lists every fixed hotfix.
What it is
SolarWinds Web Help Desk was found to be susceptible to an unauthenticated AjaxProxy deserialization remote code execution vulnerability that, if exploited, would allow an attacker to run commands on the host machine. This vulnerability is a patch bypass of CVE-2024-28988, which in turn is a patch bypass of CVE-2024-28986.
Exploitation
CISA lists this CVE as exploited in the wild since 9 Mar 2026, including in ransomware campaigns.
Sources
KEV status, EPSS score and vendor data refreshed automatically, last on 13 Oct 2026.