CVE-2019-25603 TuneClone 2.20 Structured Exception Handler Buffer Overflow
Local attackers can execute arbitrary code by providing a malicious license code string to TuneClone, potentially establishing a bind shell.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2019-25603?
CVE-2019-25603 is a high-severity memory corruption vulnerability in TuneClone, published on 22 Mar 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
TuneClone 2.20 contains a structured exception handler (SEH) buffer overflow vulnerability that allows local attackers to execute arbitrary code by supplying a malicious license code string. Attackers can craft a payload with a controlled buffer, NSEH jump instruction, and SEH handler address pointing to a ROP gadget, then paste it into the license code field to trigger code execution and establish a bind shell.
Weakness: CWE-787
Which versions are affected by CVE-2019-25603?
How do I fix CVE-2019-25603?
No fix has been published for CVE-2019-25603 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-2019-25603 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2019-25603 exists.
Sources
Also known as GHSA-h76c-4xf2-wvp8.