CVE-2025-26399

SolarWinds Web Help Desk Deserialization of Untrusted Data Privilege Escalation Vulnerability

Published Sep 23, 2025 CVSS 3.1 · 9.8 Critical EPSS 90.6% KEV · Listed
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.

Remediation

Vendor Solution

SolarWinds recommends customers to upgrade to Web Help Desk version 12.8.7 HF1 as soon as is practical.

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2025-30842 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.
History
Type Values Removed Values Added
Metrics kev

{'dateAdded': '2026-03-09T00:00:00+00:00', 'dueDate': '2026-03-12T00:00:00+00:00'}

Type Values Removed Values Added
References
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'active', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
CPEs cpe:2.3:a:solarwinds:web_help_desk:*:*:*:*:*:*:*:*
cpe:2.3:a:solarwinds:web_help_desk:12.8.7:-:*:*:*:*:*:*
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Solarwinds
Solarwinds web Help Desk
Vendors & Products Solarwinds
Solarwinds web Help Desk
Type Values Removed Values Added
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.
Title SolarWinds Web Help Desk Deserialization of Untrusted Data Privilege Escalation Vulnerability
Weaknesses CWE-502
References
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
SolarWinds
Published
Updated
Aug 4, 2026, 3:55 AM
Reserved
Feb 8, 2025, 12:19 AM
Status
Analyzed
Published
Sep 23, 2025, 5:15 AM
Modified
Oct 11, 2026, 8:10 PM