Local code execution via oversized command-line argument
Published Mar 28, 2026 · Updated Mar 28, 2026
Stack-based buffer overflow in Pavel Kouznetsov JAD 1.5.8e and earlier allows local users to execute code via an oversized argument. JAD accepts a command-line argument longer than 8,150 bytes without adequate boundary checks, allowing the input to overwrite stack data and the saved return address. A local user must invoke the decompiler with the crafted string; successful exploitation runs shellcode in the JAD process, while failed attempts crash it.
Summary
What happened
Stack-based buffer overflow in Pavel Kouznetsov JAD 1.5.8e and earlier allows local users to execute code via an oversized argument. JAD accepts a command-line argument longer than 8,150 bytes without adequate boundary checks, allowing the input to overwrite stack data and the saved return address. A local user must invoke the decompiler with the crafted string; successful exploitation runs shellcode in the JAD process, while failed attempts crash it.
The record
- CVE
- CVE-2016-20049
- Published
- Mar 28, 2026
- Updated
- Mar 28, 2026
- Vendor
- Pavel Kouznetsov
- Product
- JAD
- Classifications
- CWE-787, T1203
- Attack vector
- local
- Privileges
- Unavailable
Timeline
How it unfolded
- Mar 28, 2026CVE publishedPublication date reported by the CVE source.
- Mar 28, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=1.5.8e-1kali1
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Public exploit references
- JAD Java Decompiler 1.5.8e - Local Buffer Overflowfunctional · unverified
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Technologies
Your stack
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Your stack
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