CVE-2017-20227

CRITICAL 9.8

JAD 1.5.8e-1kali1 Stack-Based Buffer Overflow

CVSS Score

9.8

EPSS Score

0.0%

EPSS Percentile

0th

JAD Java Decompiler 1.5.8e-1kali1 and prior contains a stack-based buffer overflow vulnerability that allows attackers to execute arbitrary code by supplying overly long input that exceeds buffer boundaries. Attackers can craft malicious input passed to the jad command to overflow the stack and execute a return-oriented programming chain that spawns a shell.

CWE	CWE-787
Vendor	varaneckas
Product	jad java decompiler
Published	Mar 28, 2026
Last Updated	Apr 1, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

Varaneckas / JAD Java Decompiler

1.5.8e

References

NVD ↗ CVE.org ↗ EPSS Data ↗

exploit-db.com: https://www.exploit-db.com/exploits/42255 varaneckas.com: http://www.varaneckas.com/jad/ vulncheck.com: https://www.vulncheck.com/advisories/jad-8e-1kali1-stack-based-buffer-overflow

Credits

Juan Sacco <[email protected]> at KPN Red Team - http://www.kpn.com