CVE-2026-28318
Uncontrolled Resource Consumption in SolarWinds Serv-U. CISA confirmed attackers exploit it and added it to its Known Exploited Vulnerabilities catalog on 5 June 2026.
- Product
- SolarWinds Serv-U
- 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 Serv-U contains an uncontrolled resource consumption vulnerability that allows specially crafted POST requests using the Content-Encoding: deflate header to crash the Serv-U service without authentication.
More from SolarWinds this year.
- CVE-2025-26399 Deserialization of Untrusted Data, added
- CVE-2025-40536 Security Control Bypass, added
- CVE-2025-40551 Deserialization of Untrusted Data, 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 4 November 2026.