CVE-2026-28318: SolarWinds Serv-U Unauthenticated Denial of Service Vulnerability
In CISA’s Known Exploited Vulnerabilities catalog: SolarWinds Serv-U Uncontrolled Resource Consumption Vulnerability.
Added , federal remediation due . Known ransomware use: Unknown.
Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Description
SolarWinds Serv-U is susceptible to specially crafted POST requests that crash the Serv-U service without authentication using Content-Encoding: deflate. Mitigation steps are provided to secure customer environments in the SolarWinds Trust Center if you are unable to deploy the update
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H · CWE-400
Status incidents that name it
No tracked status incident names this CVE.
Affected vendors and products
SolarWinds: Serv-U
References
- CVE record on cve.org (opens in new tab)
- NVD entry (opens in new tab)
- documentation.solarwinds.com/en/success_center/servu/content/release_notes/servu_15-5-4-hotfix-1_r… (opens in new tab)
- www.solarwinds.com/trust-center/security-advisories/CVE-2026-28318 (opens in new tab)
- CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (opens in new tab)
- This product uses data from the NVD API but is not endorsed or certified by the NVD. (opens in new tab)
- Known Exploited Vulnerabilities catalog from CISA. (opens in new tab)
- EPSS scores from FIRST (Exploit Prediction Scoring System). (opens in new tab)