Zabbix Agent Flaw Lets Low-Privileged Users Escalate to Admin via Malicious DLL

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A medium-severity vulnerability, tracked as CVE-2026-59781, has been disclosed in Zabbix agent versions prior to 7.0.24 and 7.4.8. The flaw stems from incorrect file access permissions during installation, allowing a local low-privileged attacker to plant a malicious DLL in a path searched by the installer. When an administrator runs the vulnerable installer, it inadvertently loads the attacker's DLL, executing arbitrary code with administrator privileges. Successful exploitation could lead to privilege escalation, credential theft, persistence, and disruption of endpoint monitoring. Users are advised to upgrade to Zabbix agent 7.0.24, 7.4.8, or later, and to restrict write permissions on installer directories.

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