CVE-2025-40551
Deserialization of Untrusted Data in SolarWinds Web Help Desk. CISA confirmed attackers exploit it and added it to its Known Exploited Vulnerabilities catalog on 3 February 2026.
- Product
- SolarWinds Web Help Desk
- Added to CISA's catalog
- Federal fix-by date
- Ransomware
- No known use in ransomware campaigns
- Vendor advisories
- Sources
- CISA’s catalog, NVD entry
CISA’s 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.
More from SolarWinds this year.
- CVE-2026-28318 Uncontrolled Resource Consumption, added
- CVE-2025-26399 Deserialization of Untrusted Data, added
- CVE-2025-40536 Security Control Bypass, added
Every flaw CISA confirmed exploited in the last 30 days is on the exploit watch. This is not security advice. Check the vendor’s advisory before acting. From CISA’s catalog of 3 November 2026.