CVE-2017-13674: Symantec Proxyclient

High severity, CVSS 7.8. EPSS: 0.4% chance of exploitation in the next 30 days.

Symantec ProxyClient 3.4 for Windows is susceptible to a privilege escalation vulnerability. A malicious local Windows user can, under certain circumstances, exploit this vulnerability to escalate their privileges on the system and execute arbitrary code with LocalSystem privileges.

Affected products

• Symantec Proxyclient: version 3.4 only

Published 2017-09-01. Last modified 2026-06-17.