CVE-2025-12771: IBM Concert

High severity, CVSS 7.8. EPSS: 0.2% chance of exploitation in the next 30 days.

IBM Concert 1.0.0 through 2.1.0 is vulnerable to a stack-based buffer overflow, caused by improper bounds checking. A local user could overflow the buffer and execute arbitrary code on the system.

Affected products

• IBM Concert: from 1.0.0, before 2.2.0 (fixed in 2.2.0)

Published 2025-12-26. Last modified 2026-10-07.