CVE-2019-25569: Crun Realterm

Medium severity, CVSS 5.5. EPSS: 0.2% chance of exploitation in the next 30 days.

RealTerm Serial Terminal 2.0.0.70 contains a stack-based buffer overflow vulnerability in the Echo Port field that allows local attackers to crash the application by triggering a structured exception handler (SEH) chain corruption. Attackers can craft a malicious input string with 268 bytes of padding followed by SEH overwrite values and paste it into the Port field to cause denial of service.

Affected products

• Crun Realterm: version 2.0.0.70 only

Published 2026-03-21. Last modified 2026-06-17.