SolarWinds Web Help Desk Deserialization of Untrusted Data Vulnerability

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• NewsExploited · CISA KEVKnown ransomware useSolarWinds · Web Help Desk

  SolarWinds Web Help Desk Deserialization of Untrusted Data Vulnerability

  CVE-2025-26399

  SolarWinds Web Help Desk contain a deserialization of untrusted data vulnerability in AjaxProxy that could allow an attacker to run commands on the host machine.

  CISA's required action · due 12 Mar 2026 for U.S. federal civilian agencies

  Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

  Cited by CISA: solarwinds.com · documentation.solarwinds.com · nvd.nist.gov

  Added to KEV 9 Mar 2026 · Source checked 4 Nov 2026, 16:35 UTC · CISA KEV entry

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