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Findings

CVE-2025-26399

SolarWinds Web Help Desk Deserialization of Untrusted Data Vulnerability

Published Sep 22, 2025 · updated Oct 11, 2026 · SolarWinds Web Help Desk

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.

Timeline

Detection, updates, and resolution for this record.

  1. Sep 22, 2025 · Catalog

    Detected

    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.

  2. Mar 9, 2026 · CISA KEV

    Known exploited

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

  3. Mar 12, 2026 · CISA KEV

    Remediation due

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

  4. Oct 11, 2026 · Catalog

    Updated

    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.

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.

CISA due date Mar 12, 2026

Affected

  • cpe solarwinds/web help deskversion unspecified
  • cpe solarwinds/web help desk12.8.7
  • vendor SolarWinds Web Help Deskversion unspecified

Sources

  • CISA KEVCVE-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.gov
  • CVE.orgCVE-2025-26399

    Official CVE identifier

    cve.org
  • FIRST EPSSCVE-2025-26399

    30-day exploitation probability 89.5%

    first.org
  • NIST NVDCVE-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

    nvd.nist.gov

References