CVE-2025-40553

SolarWinds Web Help Desk Deserialization of Untrusted Data Remote Code Execution Vulnerability

9.8 Critical

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.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

68.0%Up 67.3 points since Jan 28, 2026

What each source reports

CVE List Score used 9.8

SolarWinds Web Help Desk Deserialization of Untrusted Data Remote Code Execution Vulnerability

Record: CVE-2025-40553
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-502
Updated: 2026-11-02

EUVDEUVD-2025-206482 9.8

Record: EUVD-2025-206482
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

GitHub AdvisoriesGHSA-5gq3-mh83-6m28 9.8

SolarWinds Web Help Desk was found to be susceptible to an untrusted data deserialization...

Record: GHSA-5gq3-mh83-6m28
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-502
Updated: 2026-11-02

NVD 9.8

Record: CVE-2025-40553
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-502
Updated: 2026-11-02

Affected products

solarwinds web help desk

History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2025-40553 is a critical vulnerability (CVSS 9.8) in Solarwinds Web Help Desk, published January 28, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 68.0%, the 99th percentile. No source names a fixed version.