CVE-2025-40551 | SolarWinds Web Help Desk was found to be susceptible to an u… | CVSS 9.8 CRITICAL

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.

Metadata

CVE ID: CVE-2025-40551
State: PUBLISHED
Assigner: SolarWinds
Reserved: 2025-04-16 08:01 UTC
Published: 2026-01-28 07:33 UTC
Last updated: 2026-02-26 15:04 UTC
Primary CWE: CWE-502
CWE-502 Deserialization of Untrusted Data
Vendor / Product: SolarWinds / Web Help Desk
Sources: cve.org · NVD

Severity & Metrics

9.8 CRITICAL CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

SSVC — CISA Coordinator

Exploitation: ACTIVE
Automatable: yes
Tech. Impact: total

CISA Known Exploited Vulnerability

Vulnerability name: SolarWinds Web Help Desk Deserialization of Untrusted Data Vulnerability
Vendor: SolarWinds
Product: Web Help Desk
Added to KEV: 2026-02-03
Due date: 2026-02-06
Ransomware: Not known

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 description

SolarWinds Web Help Desk contains a deserialization of untrusted data 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 (1)

Vendor	Product	Platform	Versions
SolarWinds	Web Help Desk	—	12.8.8 HF1 and below

Weakness (CWE)

CWE	Source	Description
CWE-502	cna	CWE-502 Deserialization of Untrusted Data

CVSS scores (1)

Score	Severity	Version	Source	Vector
9.8	CRITICAL	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References (2)