CVE-2025-40553

CRITICAL9.8Insecure deserialization

High EPSS

Description

SolarWinds Web Help Desk was found to be susceptible to an untrusted data deserialization vulnerability that could lead to remote code execution, which would allow an attacker to run commands on the host machine. This could be exploited without authentication.

CVSS breakdown

CVSS 3.1

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected products

SolarWinds / Web Help Desk12.8.8 HF1 and below – 12.8.8 HF1 and below

References

VENDOR_ADVISORYhttps://www.solarwinds.com/trust-center/security-advisories/CVE-2025-40553
MISChttps://documentation.solarwinds.com/en/success_center/whd/content/release_notes/whd_2026-1_release_notes.htm