CVE-2025-26399

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.

CVSS v3 vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weaknesses (CWE)

CWE-502

Threats tracking this CVE

• SolarWinds Web Help Desk Deserialization RCE - CISA KEV — CRITICAL

References

• https://documentation.solarwinds.com/en/success_center/whd/content/release_notes/whd_12-8-7-hotfix-1_release_notes.htm
• https://www.solarwinds.com/trust-center/security-advisories/CVE-2025-26399
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-26399
• https://www.microsoft.com/en-us/security/blog/2026/02/06/active-exploitation-solarwinds-web-help-desk/

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