CVE WatchJul 22, 2026

CVE-2026-28318

SolarWinds Serv-U Uncontrolled Resource Consumption Vulnerability

CVSS

7.5

High

EPSS

40.0%

p99

KEV

YES

Jun 5, 2026

Exploit Today

0-100

Published: Jun 4, 2026 · Last modified: Jul 22, 2026 · CWE-400

EPSS · 30d

8.4%EPSS · 30 days40.0%

2026-08-022026-08-30

KEV catalog record

Product

SolarWinds / Serv-U

Vulnerability

SolarWinds Serv-U Uncontrolled Resource Consumption Vulnerability

Added to KEV

Jun 5, 2026

Remediate by

Jun 19, 2026

Known ransomware use

Summary description

SolarWinds Serv-U contains an uncontrolled resource consumption vulnerability that allows specially crafted POST requests using the Content-Encoding: deflate header to crash the Serv-U service without authentication.

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.

Notes

https://www.solarwinds.com/trust-center/security-advisories/cve-2026-28318 ; https://documentation.solarwinds.com/en/success_center/servu/content/release_notes/servu_15-5-4-hotfix-1_release_notes.htm#link7 ; https://nvd.nist.gov/vuln/detail/CVE-2026-28318

Technical 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

Official references

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