All vulnerabilities
CVE-2025-40551

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 3 Feb 2026CISA KEV
Exploit odds (EPSS)84.2%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 deadline6 Feb 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. 28 Jan 2026, 07:33 UTCPublishedCVE List
  2. 28 Jan 2026Exploit code publicMetasploit
  3. 3 Feb 2026Added to CISA KEVCISA KEV

Public exploit code and templates 2

  • Exploit moduleSolarWinds Web Help Desk unauthenticated RCE 28 Jan 2026Metasploit
  • Scanner templateSolarWinds Web Help Desk < 2026.1 - Unauthenticated JNDI Injection RCENuclei

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

Description

SolarWinds Web Help Desk contains a deserialization of untrusted data vulnerability that could lead to remote code execution, which would allow an attacker to run commands on the host machine. This could be exploited without authentication.

Text from CVE List

Affected versions 1

  • Web Help Deskaffected: 12.8.8 HF1 and belowCVE List

References 5