#VU123488 Integer overflow in ActiveMQ - CVE-2025-66168
Published: March 4, 2026 / Updated: April 10, 2026
Vulnerability identifier: #VU123488
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2025-66168
CWE-ID: CWE-190
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
ActiveMQ
ActiveMQ
Software vendor:
Apache Foundation
Apache Foundation
Description
The vulnerability allows a remote user to perform a denial of service attack.
The vulnerability exists due to integer overflow within the MQTT module when decoding malformed packets. A remote user can send specially crafted packets to the application, trigger an integer overflow and perform a denial of service attack. Note, the vulnerability does not affect brokers with not enabled MQTT transport connectors.
Remediation
Install updates from vendor's website.