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zabbix

Zabbix Server and Proxy accept active agent heartbeat messages without enforcing the configured PSK or certificate authentication. This allows an attacker with access to the Zabbix trapper port to falsely report an arbitrary host as available, compromising data integrity.

CVE-2026-59786 describes a vulnerability in Zabbix Server and Proxy where the active agent heartbeat message is accepted regardless of the configured pre-shared key (PSK) or certificate authentication. This flaw permits an attacker who can access the Zabbix trapper port to spoof active agent heartbeats, causing the system to incorrectly mark hosts as available. The issue results in a loss of integrity of monitoring data but does not affect confidentiality or availability directly.

Zabbix Server and Proxy accept the active agent heartbeat message regardless of the configured PSK or certificate authentication. (CVE-2026-59786)

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