CVE-2019-25679: Crun Realterm

High severity, CVSS 7.8. EPSS: 0.3% chance of exploitation in the next 30 days.

RealTerm Serial Terminal 2.0.0.70 contains a structured exception handling (SEH) buffer overflow vulnerability in the Echo Port tab that allows local attackers to execute arbitrary code by supplying a malicious payload. Attackers can craft a buffer overflow payload with a POP POP RET gadget chain and shellcode that triggers code execution when pasted into the Port field and the Change button is clicked.

Affected products

• Crun Realterm: version 2.0.0.70 only

Published 2026-04-05. Last modified 2026-07-24.