Untrusted Data Deserialization Flaw in SolarWinds Web Help Desk
CVE-2025-40553

9.8CRITICAL

Key Information:

Vendor

Solarwinds
Status
Web Help Desk
Vendor
CVE Published:
28 January 2026

What is CVE-2025-40553?

The SolarWinds Web Help Desk has a flaw related to untrusted data deserialization. This vulnerability allows a malicious actor to exploit the weakness and execute arbitrary code on the server without requiring authentication. If successfully exploited, attackers could gain significant control over the affected system, posing serious risks to data integrity and security.

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Affected Version(s)

Web Help Desk 12.8.8 HF1 and below

References

https://www.solarwinds.com/trust-center/security-advisori...
https://documentation.solarwinds.com/en/success_center/wh...
release-notes

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Piotr Bazydlo working with watchTowr
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