Detections
Analytics
Zabbix Server 7.0.x < 7.0.29 / 7.4.x < 7.4.13 Authentication Bypass (ZBX-28196)
medium Nessus Plugin ID 364175
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Synopsis
A monitoring application installed on the remote host is affected by an authentication bypass vulnerability.Description
The version of Zabbix Server installed on the remote host is 7.0.x prior to 7.0.29, or 7.4.x prior to 7.4.13. It is, therefore, affected by an authentication bypass vulnerability:- Zabbix Server and Proxy accept the active agent heartbeat message regardless of the configured PSK or certificate authentication. This means someone with access to the Zabbix trapper port can report an arbitrary host using an active agent as available, resulting in a loss of integrity. (CVE-2026-59786)
Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.
Solution
Upgrade to Zabbix version 7.0.29, 7.4.13 or later.See Also
Plugin Details
Severity: Medium
ID: 364175
File Name: zabbix_ZBX-28196.nasl
Version: 1.3
Type: Local
Agent: unix
Family: Misc.
Published: 10/8/2026
Updated: 10/9/2026
Supported Sensors: Nessus Agent, Nessus
Risk Information
VPR
Risk Factor: Low
Score: 3
Percentile: 23.66
CVSS v2
Risk Factor: Medium
Base Score: 5
Temporal Score: 3.7
Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:P/A:N
CVSS Score Source: CVE-2026-59786
CVSS v3
Risk Factor: Medium
Base Score: 5.3
Temporal Score: 4.6
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
CVSS v4
Risk Factor: Medium
Base Score: 6.9
Threat Score: 2.7
Threat Vector: CVSS:4.0/E:U
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
Vulnerability Information
CPE: cpe:/a:zabbix:zabbix_server
Required KB Items: installed_sw/Zabbix Server
Exploit Ease: No known exploits are available
Patch Publication Date: 10/5/2026
Vulnerability Publication Date: 10/5/2026
Reference Information
CVE: CVE-2026-59786
IAVA: 2026-A-1106