CVE-2026-28318

HIGH7.5

CISA KEV

Published 2026-06-04 · Updated 2026-10-21 · Source psirt@solarwinds.com

Summary

CVE-2026-28318 is a high-severity (CVSS 7.5) vulnerability in SolarWinds Serv-U. CISA added it to the Known Exploited Vulnerabilities catalog on June 5, 2026, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by June 19, 2026. CISA does not currently list it as used in ransomware campaigns. SolarWinds has 11 vulnerabilities in the KEV catalog, 2 of them linked to ransomware.

All 11 known-exploited SolarWinds vulnerabilities →

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

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

CWE-400

CISA Known-Exploited Vulnerability

Product: SolarWinds — Serv-U

Name: SolarWinds Serv-U Uncontrolled Resource Consumption Vulnerability

Date added: 2026-06-05 · Due: 2026-06-19

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.

References

View on NVD

More exploited SolarWinds vulnerabilities

Most recently added to CISA KEV

CVE-2025-26399
RANSOMWARE
Web Help Desk — SolarWinds Web Help Desk Deserialization of Untrusted Data Vulnerability
added 2026-03-09
CVE-2025-40536
Web Help Desk — SolarWinds Web Help Desk Security Control Bypass Vulnerability
added 2026-02-12
CVE-2025-40551
Web Help Desk — SolarWinds Web Help Desk Deserialization of Untrusted Data Vulnerability
added 2026-02-03
CVE-2024-28987
Web Help Desk — SolarWinds Web Help Desk Hardcoded Credential Vulnerability
added 2024-10-15
CVE-2024-28986
Web Help Desk — SolarWinds Web Help Desk Deserialization of Untrusted Data Vulnerability
added 2024-08-15
CVE-2024-28995
Serv-U — SolarWinds Serv-U Path Traversal Vulnerability
added 2024-07-17

View all →

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