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Solution
Upgrade to SolarWinds Serv-U 15.5.4 Hotfix 1. Use the mitigation steps until the upgrade is possible.
Workaround
Block any POST requests containing 'Content-Encoding: deflate'. This function is not required for SolarWinds Serv-U.
Thu, 04 Jun 2026 14:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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 | |
| Title | SolarWinds Serv-U Unauthenticated Denial of Service Vulnerability | |
| Weaknesses | CWE-400 | |
| References |
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| Metrics |
cvssV3_1
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Projects
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Status: PUBLISHED
Assigner: SolarWinds
Published:
Updated: 2026-06-04T15:12:33.510Z
Reserved: 2026-02-26T14:46:41.520Z
Link: CVE-2026-28318
No data.
Status : Undergoing Analysis
Published: 2026-06-04T15:16:50.407
Modified: 2026-06-04T15:35:18.623
Link: CVE-2026-28318
No data.
OpenCVE Enrichment
Updated: 2026-06-04T15:30:17Z