SolarWinds Serv-U fixes 1 high-severity vulnerability

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[TLP:CLEAR] SolarWinds Serv-U fixes 1 high-severity vulnerability

SolarWinds fixes a high-severity vulnerability in Serv-U with version 15.5.4 HF1 [1].

SolarWinds Serv-U - DoS (CVE-2026-28318)

CVSS 7.5 (High)

An unauthenticated remote attacker can perform a DoS attack due to improper handling of specially crafted POST requests with the "Content-Encoding: deflate" header. As a mitigation, SolarWinds recommends adding rules to the web application firewall that, where possible, restrict access to known addresses only and block all POST requests containing the “content-encoding” header, as this functionality is not required by the service [1].

The vulnerability is present in product:

SolarWinds Serv-U; <=15.5.4

CVSS: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

More information:

CVE-2026-28318 at cve.org, NVD
CWE-400: Uncontrolled Resource Consumption at cwe.mitre.org

The vulnerability was publicly disclosed 3. 6. 2026.

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[TLP:CLEAR] SolarWinds Serv-U fixes 1 high-severity vulnerability

SolarWinds Serv-U - DoS (CVE-2026-28318)

CVSS 7.5 (High)

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