Asymmetric Resource Consumption (Amplification) in Zabbix - CVE-2025-49643

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Main Vulnerability Database Vulnerabilities #VU121936

Asymmetric Resource Consumption (Amplification) in Zabbix - CVE-2025-49643

Published: January 22, 2026


Vulnerability identifier: #VU121936
CSH Severity: Medium
CVSS v4: 6 [CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2025-49643
CWE-ID: CWE-405
Exploitation vector: Adjecent network
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to asymmetric resource consumption in the imgstore.php. A remote attacker on the local network can trigger resource exhaustion and perform a denial of service (DoS) attack.


Affected software

Zabbix
Fedora
zabbix6.0

How to mitigate CVE-2025-49643

Install updates from vendor's website.

Zabbix - addressed in versions 6.0.42, 7.0.19, 7.2.13, 7.4.3
zabbix6.0 - update to 6.0.44-1.el8

External References

Related Security Bulletins