CVE-2019-25679 RealTerm Serial Terminal 2.0.0.70 Buffer Overflow SEH
Local attackers can execute arbitrary code via a buffer overflow in the Echo Port tab of RealTerm Serial Terminal.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2019-25679?
CVE-2019-25679 is a high-severity memory corruption vulnerability in RealTerm: Serial Terminal, published on 5 Apr 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
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.
Weakness: CWE-787
Which versions are affected by CVE-2019-25679?
It affects 1 product.
Products include Crun Realterm.
How do I fix CVE-2019-25679?
No fix has been published for CVE-2019-25679 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2019-25679 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2019-25679 exists.
Other vulnerabilities in RealTerm: Serial Terminal
Sources
Also known as GHSA-6g5p-8cx2-hpcp.