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CVE-2026-28318

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

Scores

7.5
CVSS 7.5 out of 10, high severity.
1.9%
EPSS 1.9% chance of exploitation in the next 30 days.

The facts

Published
4 June 2026
Last changed
22 July 2026
NVD status
Analyzed
Severity
High, CVSS 7.5 out of 10 (version 3.1)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
Affects
  • solarwinds serv-u
Known exploited
Yes. CISA added it to the Known Exploited Vulnerabilities catalogue on 5 June 2026.
EPSS
1.9% chance of exploitation activity in the next 30 days (percentile 80).

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References