What’s Vulnerable › Vulnerabilities

CVE-2025-40551: SolarWinds Web Help Desk Deserialization of Untrusted Data Vulnerability

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: yes — in CISA KEV since 2026-02-03
• EPSS: 84.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-01-28 · updated 2026-06-17
• Weakness: CWE-502

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.

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-2025-40551
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-40551

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