SB2026060972 - Remote denial of service in SolarWinds Serv-U FTP Server
Published: June 9, 2026
Security Bulletin ID
SB2026060972
CSH Severity
High
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Improper handling of exceptional conditions (CVE-ID: CVE-2026-28318)
CWE-ID: CWE-755 - Improper Handling of Exceptional Conditions
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:A/U:Amber
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to improper handling of deflate-encoded post requests in Serv-U service when handling HTTP POST requests with Content-Encoding: deflate. A remote attacker can send a specially crafted HTTP POST request to cause a denial of service.
Note, the vulnerability is being exploited in the wild.
Remediation
Install update from vendor's website.