What is CVE-2025-40552?

CVE-2025-40552 is a critical-severity vulnerability in Solarwinds Web Help Desk, classified under Weak Authentication. CVSS score: 9.8/10. Published 2026-01-28.

How severe is CVE-2025-40552?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2025-40552 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Solarwinds Web Help Desk

CVE-2025-40552

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.

EPSS: 0.086 (92.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Solarwinds Web Help Desk — versions 12.8.8 HF1 and below

Weakness classification (CWE)

CWE-1390 — Weak Authentication

Public proof-of-concept exploits

watchtowrlabs/watchTowr-vs-SolarWinds-WebHelpDesk-CVE-2025-40552-CVE-2025-40553

References

Frequently asked questions

What is CVE-2025-40552?: CVE-2025-40552 is a critical-severity vulnerability in Solarwinds Web Help Desk, classified under Weak Authentication. CVSS score: 9.8/10. Published 2026-01-28.
How severe is CVE-2025-40552?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2025-40552 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.