CVE-2021-35243: SolarWinds Web Help Desk

High severity, CVSS 7.5. EPSS: 0.9% chance of exploitation in the next 30 days.

The HTTP PUT and DELETE methods were enabled in the Web Help Desk web server (12.7.7 and earlier), allowing users to execute dangerous HTTP requests. The HTTP PUT method is normally used to upload data that is saved on the server with a user-supplied URL. While the DELETE method requests that the origin server removes the association between the target resource and its current functionality. Improper use of these methods may lead to a loss of integrity.

Affected products

• SolarWinds Web Help Desk: up to and including 12.7.7

Published 2021-12-23. Last modified 2026-06-17.