CVE-2025-40551Critical· 9.8▾ Hadal⚠ Exploited in the wildPoC availableSolarWinds Web Help Desk was found to be susceptible to an untrusted data deserialization vulnerability that could lead to remote code execution, which would allow an attacker to run commands on the host machine. This could be exploited …
▾ Hadal zone — Critical and actively exploited (CISA KEV / 0day)
impact 53.9 · likelihood 16.8 · exploitation 25
A public proof-of-concept already exists for this vulnerability — see Exploit availability below.
Public exploit / PoC code seen in 2 sources. Availability, not in-the-wild use.
Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the assigning CNA record, not NVD.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Federal remediation due Feb 6, 2026
Last analysed / modified upstream
84%
Metasploit ×1 · Nuclei ×1 (last check)
Added to the CISA catalog on Feb 3, 2026. Federal remediation due Feb 6, 2026. View catalog ↗
SolarWinds Web Help Desk was found to be susceptible to an untrusted data deserialization 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.
web_help_desk 12.8.8 HF1 and belowSolarWinds recommends customers upgrade to Web Help Desk version 2026.1.
Connected by shared product, vendor, weakness, or advisory.
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