Vulnerabilities CVE-2025-26399

CVE-2025-26399

Critical

Open

KEV

TLP:CLEAR

SolarWinds Web Help Desk Deserialization of Untrusted Data Privilege Escalation Vulnerability

NVD CVE.org

Supply Chain Attack

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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.

Details

CVSS Score: 9.8
EPSS Score ⓘ: 88.33%

99.8th percentile
CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Confidence: 100%
Published: Sep 23, 2025
Last Modified: Aug 4, 2026
CISA KEV
Date Added: Mar 9, 2026
Patch Due: Mar 12, 2026
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.

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