All vulnerabilities
CVE-2025-26399

SolarWinds Web Help Desk Deserialization of Untrusted Data Vulnerability

SolarWinds Web Help DeskApplications & CMS
Open in ThreatlineRecord JSON
CVSS
9.8Critical
ExploitationExploited in the wildAdded to KEV 9 Mar 2026. Known ransomware useCISA KEV
Exploit odds (EPSS)90.1%Chance of exploitation activity in the next 30 days, higher than 99% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed inNone listedNo source names a fixed version. Check the vendor advisory below
Federal deadline12 Mar 2026Remediation due date for US federal agenciesCISA KEV
CISA required actionApply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. CISA KEV

What fixes it

No source in this snapshot names a fixed version. The vendor advisories under References are the place to check.

Timeline

  1. 23 Sep 2025, 05:07 UTCPublishedCVE List
  2. 9 Mar 2026Added to CISA KEVCISA KEV

Public exploit code and templates 1

  • Scanner templateSolarWinds Web Help Desk < 12.8.7 - AjaxProxy Deserialization RCENuclei

Listed so defenders can prioritize. Threatline links to the source and does not host exploit code.

Description

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.

Text from CVE List

Affected versions 1

  • Web Help Deskaffected: 12.8.7 and belowCVE List

References 6