SolarWinds Hit by Yet Another Web Help Desk RCE Patch Bypass in 2025
In September 2025, SolarWinds disclosed a critical security vulnerability (CVE-2025-26399) in its Web Help Desk (WHD) software, affecting version 12.8.7 and prior. This flaw—stemming from unsafe deserialization in the AjaxProxy component—permits unauthenticated attackers to achieve remote code execution (RCE) on affected servers. The issue represents a patch bypass for earlier vulnerabilities (CVE-2024-28986, CVE-2024-28988), demonstrating persistent weaknesses in the remediation process. While there are no documented exploitations as of publication, previous flaws in this component were added to CISA’s Known Exploited Vulnerabilities catalog, underscoring risk to organizations reliant on WHD for ticketing and IT asset management. This incident underscores the enduring challenge of patch bypasses, where subsequent hotfixes fail to fully resolve underlying flaws, leading to repeated exposures. Weaknesses in serialization logic and high-value IT management software are a favored target for attackers seeking lateral movement, privilege escalation, or supply chain compromise.
Kill Chain