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

Project Subscriptions

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Advisories

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Fixes

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.

History

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
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: SolarWinds

Published:

Updated: 2026-06-04T15:12:33.510Z

Reserved: 2026-02-26T14:46:41.520Z

Link: CVE-2026-28318

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Undergoing Analysis

Published: 2026-06-04T15:16:50.407

Modified: 2026-06-04T15:35:18.623

Link: CVE-2026-28318

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-06-04T15:30:17Z

Weaknesses