SolarWinds Web Help Desk Deserialization of Untrusted Data Vulnerability (CVE-2025-40551)
Severity: critical · Patch status: unknown · Since 2026-02-03 · CVE-2025-40551
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. CISA added CVE-2025-40551 to its Known Exploited Vulnerabilities catalog on Feb 3, 2026, which means attackers are exploiting it in the wild.
What to do
- Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
- US federal agencies must remediate by Feb 6, 2026 (BOD 22-01); treat that as the outer limit.
Sources
All live incidents on Threat Watch
