CVE-2025-40551

CriticalActively exploited (CISA KEV)

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.

SeverityCritical

CVSS9.8

Exploit probability—

Product

SolarWinds Web Help Desk

PublishedJan 28, 2026

First seenJan 28, 2026

Added to KEVFeb 3, 2026

Weakness typeCWE-502Deserialization of untrusted data

How to fix

CISA required action

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

CISA due date: Feb 6, 2026

Update

solarwinds web_help_desk2026.1 or later

Patches

solarwinds.com/trust-center/security-advisories/CVE-2025-40551

Vendor advisories

documentation.solarwinds.com/en/success_center/whd/content/release_notes/whd_2026-1_release_notes.htm

Affected products

Product	Affected versions	Fixed in
solarwinds web_help_desk	v < 2026.1	2026.1

Check your version

Choose the product and enter the version you run to see whether it falls in the affected range.

In the Intelligence 360 plan

Attack Surface Management

See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.