CVE-2025-26399 | 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 unauthenticated AjaxProxy deserialization remote code execution vulnerability that, if exploited, would allow an attacker to run commands on the host machine. This vulnerability is a patch bypass of CVE-2024-28988, which in turn is a patch bypass of CVE-2024-28986.

Metadata

CVE ID: CVE-2025-26399
State: PUBLISHED
Assigner: SolarWinds
Reserved: 2025-02-08 00:19 UTC
Published: 2025-09-23 05:07 UTC
Last updated: 2026-03-10 03:55 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: 2026-03-09
Due date: 2026-03-12
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 contain a deserialization of untrusted data vulnerability in AjaxProxy that could allow an attacker to run commands on the host machine.

Affected products (1)

Vendor	Product	Platform	Versions
SolarWinds	Web Help Desk	—	12.8.7 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)