high7.5Known exploited
CVE-2026-28318
SolarWinds Serv-U Uncontrolled Resource Consumption Vulnerability
Exploited in the wild
This vulnerability is on the CISA Known Exploited Vulnerabilities list, added 2026-06-05. Federal due date: 2026-06-19.
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Impact
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.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Solarwinds | Serv-U | before 15.5.4 Version 15.5.4 |
Weakness classification
References
- NVD record
- CVE.org record
- CISA KEV catalog
- https://documentation.solarwinds.com/en/success_center/servu/content/release_notes/servu_15-5-4-hotfix-1_release_notes.htm
- https://www.solarwinds.com/trust-center/security-advisories/CVE-2026-28318
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-28318