CVE-2025-26399

CRITICAL
2025-09-23 [email protected]
9.8
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

4
Analysis Generated
Mar 28, 2026 - 19:13 vuln.today
Patch Released
Mar 28, 2026 - 19:13 nvd
Patch available
Added to CISA KEV
Mar 10, 2026 - 13:11 cisa
CISA KEV
CVE Published
Sep 23, 2025 - 05:15 nvd
CRITICAL 9.8

Tags

RCE Deserialization Web Help Desk

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.

Analysis

SolarWinds Web Help Desk contains an unauthenticated deserialization RCE via AjaxProxy, a patch bypass of both CVE-2024-28988 and CVE-2024-28986, the third iteration of this vulnerability.

Technical Context

The CWE-502 deserialization in AjaxProxy processes untrusted data without proper class filtering. This is a double patch bypass, indicating the remediation approach was fundamentally insufficient.

Affected Products

['SolarWinds Web Help Desk']

Remediation

Apply the latest SolarWinds patches. Consider the pattern of repeated bypasses when evaluating continued use of the product.

Priority Score

127
Low Medium High Critical
KEV: +50
EPSS: +28.2
CVSS: +49
POC: 0

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CVE-2025-26399 vulnerability details – vuln.today
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