Asymmetric Resource Consumption (Amplification) in Zabbix - CVE-2025-49643
Published: January 22, 2026
Vulnerability identifier: #VU121936
CSH Severity: Medium
CVSS v4.0: 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/E:U/U:Green
CVE-ID: CVE-2025-49643
CWE-ID: CWE-405
Exploitation vector: Adjecent network
Exploit availability:
No public exploit available
Vendor: Zabbix
Affected software:
Zabbix
Zabbix
Detailed vulnerability description
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.
How to mitigate CVE-2025-49643
Install updates from vendor's website.