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CVE-2026-28318

7.5
HIGHCVSS v3.1 Base Score
0.06%
LOW RiskEPSS (20th percentile)
KEV

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

Published: 6/4/2026
Modified: 6/5/2026
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ACTIVELY EXPLOITED IN THE WILD

This vulnerability is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

Vulnerability Name:

SolarWinds Serv-U Uncontrolled Resource Consumption Vulnerability

Vendor / Product:

SolarWinds Serv-U

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.

Due Date: 6/19/2026
Added to KEV:

6/5/2026

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

Vulnerability Summary

CVSS v3 Score

7.5HIGH

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

EPSS Score (Exploitation Probability)

0.06%LOW Exploitation Risk
20th percentile

This vulnerability has a 0.06% probability of being exploited in the next 30 days, ranking higher than 20% of all scored CVEs.

CWE Classification

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