CVE-2016-20049
CVE-2016-20049 is a critical-severity vulnerability in Varaneckas Jad Java Decompiler with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-787.
Key facts
- Severity: Critical (CVSS 3.x base score 9.8)
- CVSS v4: 9.3
- EPSS exploit prediction: 1% (47th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2016-10852
- Weakness: CWE-787
- Affected product: Varaneckas Jad Java Decompiler
- Published:
- Last modified:
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.
Frequently asked questions
- What is CVE-2016-20049?
- 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.
- How severe is CVE-2016-20049?
- CVE-2016-20049 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2016-20049 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2016-20049?
- CVE-2016-20049 affects Varaneckas Jad Java Decompiler. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2016-20049?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
- Does CVE-2016-20049 have an EU (EUVD) identifier?
- Yes. CVE-2016-20049 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2016-10852.
- When was CVE-2016-20049 published?
- CVE-2016-20049 was published on 2026-03-28 and last updated on 2026-06-17.
References
- http://www.varaneckas.com/jad/
- https://www.exploit-db.com/exploits/42076
- https://www.vulncheck.com/advisories/jad-8e-1kali1-stack-based-buffer-overflow-remote-code-execution
Affected products (1)
- cpe:2.3:a:varaneckas:jad_java_decompiler:1.5.8e-1kali1:*:*:*:*:*:*:*
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