CVE-2016-20049 JAD 1.5.8e-1kali1 Stack-Based Buffer Overflow Remote Code Execution
Attackers can execute arbitrary code by supplying oversized input to JAD Java Decompiler, leading to stack-based buffer overflow.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2016-20049?
CVE-2016-20049 is a critical memory corruption vulnerability in Varaneckas JAD Java Decompiler, published on 28 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
JAD 1.5.8e-1kali1 and prior contains a stack-based buffer overflow vulnerability that allows attackers to execute arbitrary code by supplying oversized input that exceeds buffer boundaries. Attackers can craft malicious input strings exceeding 8150 bytes to overflow the stack, overwrite return addresses, and execute shellcode in the application context.
Weakness: CWE-787
Which versions are affected by CVE-2016-20049?
It affects 1 product.
Products include Varaneckas Jad Java Decompiler.
How do I fix CVE-2016-20049?
No fix has been published for CVE-2016-20049 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-2016-20049 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2016-20049 exists.
Other vulnerabilities in Varaneckas JAD Java Decompiler
Sources
Also known as GHSA-x5f7-xgg8-pr9p.