IBM App Connect Enterprise versions 13.0.1.0 through 13.0.8.0 and 12.0.1.0 through 12.0.12.27 contain a vulnerability that allows a local attacker to execute arbitrary code due to insecure deserialization. This vulnerability is identified as CVE-2026-17416 and has a high severity rating with a CVSS score of 7.8. The flaw requires local access and user interaction to exploit. No official patch or remediation details are provided in the available data.