SB2025092357 - Remote code execution in SolarWinds Web Help Desk

Description

This security bulletin contains information about 1 security vulnerability.

1) Deserialization of Untrusted Data (CVE-ID: CVE-2025-26399)

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to insecure input validation when processing serialized data within the AjaxProxy. A remote attacker can pass specially crafted data to the application and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Note, the vulnerability exists due to unsuccessful patching addressed in #VU98770 (CVE-2024-28988) and #VU96009 (CVE-2024-28986).

Remediation

Install update from vendor's website.

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.zerodayinitiative.com/advisories/ZDI-25-906/