CVE-2025-40552: SolarWinds Web Help Desk Authentication Bypass Vulnerability

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 52.0% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2026-01-28 · updated 2026-06-17
Weakness: CWE-1390

Description

SolarWinds Web Help Desk was found to be susceptible to an authentication bypass vulnerability that if exploited, would allow a malicious actor to execute actions and methods that should be protected by authentication.

Affected products

SolarWinds Web Help Desk: before 2026.1 — fixed in 2026.1

How to fix

Upgrade to a fixed version: SolarWinds Web Help Desk 2026.1. Check the vendor advisory for mitigations.

References

https://documentation.solarwinds.com/en/success_center/whd/content/release_notes/whd_2026-1_release_notes.htm
https://www.solarwinds.com/trust-center/security-advisories/CVE-2025-40552
https://github.com/watchtowrlabs/watchTowr-vs-SolarWinds-WebHelpDesk-CVE-2025-40552-CVE-2025-40553/blob/main/watchTowr-vs-SolarWinds-WebHelpDesk-CVE-2025-40552-CVE-2025-40553.py

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