SolarWinds Web Help Desk Deserialization of Untrusted Data Vulnerability

SolarWinds Web Help Desk

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. Added to CISA KEV on 2026-03-09 (federal deadline 2026-03-12).

First seen: 9 Mar 2026
Last update: 9 Mar 2026, 12:00 UTC
Identifiers: CVE-2025-26399
Source: CISA KEV
On the menu as: Enterprise apps

Check this repository for exposure to one security incident from pwned.coffee. Report first, change nothing until I say so.

## SolarWinds Web Help Desk Deserialization of Untrusted Data Vulnerability
Severity: critical, exploited in the wild. Patch status: patched.
Affected: SolarWinds Web Help Desk
Ids: CVE-2025-26399

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. Added to CISA KEV on 2026-03-09 (federal deadline 2026-03-12).

## Steps
1. This touches infrastructure (erp). Look in terraform, ansible, cloud-init, Dockerfiles and docs for the product and version we run. If it isn't in the repo, say so and list what a human should check on the box.

## Report
A table: file, product or package, version in use, affected yes/no, exact fix. Then anything a human has to check outside the repo.

If you have the pwned.coffee MCP server (https://pwned.coffee/mcp), call lookup_cve("CVE-2025-26399") for the latest, and check_repo with this repo's lockfiles, Dockerfiles and workflows for a full receipt.
Sources: 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 https://www.solarwinds.com/trust-center/security-advisories/cve-2025-26399
https://pwned.coffee/i/solarwinds-web-help-desk-deserialization-of-untrusted-da-cve-2025-26399

Sources

Totalone very hot coffee