CVE-2017-20227
CVE-2017-20227 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-2017-18947
- Weakness: CWE-787
- Affected product: Varaneckas Jad Java Decompiler
- Published:
- Last modified:
Description
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.
Frequently asked questions
- What is CVE-2017-20227?
- 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.
- How severe is CVE-2017-20227?
- CVE-2017-20227 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-2017-20227 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-2017-20227?
- CVE-2017-20227 affects Varaneckas Jad Java Decompiler. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2017-20227?
- 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-2017-20227 have an EU (EUVD) identifier?
- Yes. CVE-2017-20227 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2017-18947.
- When was CVE-2017-20227 published?
- CVE-2017-20227 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/42255
- https://www.vulncheck.com/advisories/jad-8e-1kali1-stack-based-buffer-overflow
Affected products (1)
- cpe:2.3:a:varaneckas:jad_java_decompiler:1.5.8e-1kali1:*:*:*:*:*:*:*
More vulnerabilities in Varaneckas Jad Java Decompiler
- CVE-2016-20049 — Critical (CVSS 9.8): JAD 1.5.8e-1kali1 and prior contains a stack-based buffer overflow vulnerability that allows attackers to execute…
All CVEs affecting Varaneckas Jad Java Decompiler →
Other CWE-787 (Out-of-bounds Write) vulnerabilities
- CVE-2026-42369 — Critical (CVSS 10.0): GV-VMS V20 is a Video Monitoring Software used to gather the feeds of many surveillance cameras and manage other…
- CVE-2026-4746 — Critical (CVSS 10.0): Out-of-bounds Write vulnerability in timeplus-io proton (base/poco/Foundation/src modules). This vulnerability is…
- CVE-2025-43300 — Critical (CVSS 10.0): An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 15.8.5 and iPadOS…
- CVE-2025-24201 — Critical (CVSS 10.0): An out-of-bounds write issue was addressed with improved checks to prevent unauthorized actions. This issue is fixed in…
- CVE-2024-42479 — Critical (CVSS 10.0): llama.cpp provides LLM inference in C/C++. The unsafe `data` pointer member in the `rpc_tensor` structure can cause…
- CVE-2024-39791 — Critical (CVSS 10.0): Stack-based buffer overflow vulnerabilities affecting Vonets industrial wifi bridge relays and wifi bridge…