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Vulnerabilities

CVE-2016-20040

High
TiEmu 3.03-nogdb+dfsg-3 contains a buffer overflow vulnerability in the ROM parameter handling that allows local attackers to crash the application or execute arbitrary code. Attackers can supply an o
CWE-22 — Weakness Type
Published: Mar 28, 2026  ·  Modified: Apr 4, 2026  ·  Source: NVD
CVSS v3
8.4
🔗 NVD Official
📄 Description (English)

TiEmu 3.03-nogdb+dfsg-3 contains a buffer overflow vulnerability in the ROM parameter handling that allows local attackers to crash the application or execute arbitrary code. Attackers can supply an oversized ROM parameter to the tiemu command-line interface to overflow the stack buffer and overwrite the instruction pointer with malicious addresses.

🤖 AI Executive Summary

CVE-2016-20040 is a stack buffer overflow vulnerability in TiEmu 3.03 affecting ROM parameter handling, allowing local attackers to crash the application or execute arbitrary code with CVSS 8.4. While no public exploit is currently available and the vulnerability is 8 years old, the lack of patching and local attack vector pose risks to organizations using legacy calculator emulation software. This vulnerability is particularly concerning in educational and research institutions where TiEmu may still be deployed.

📄 Description (Arabic)

🤖 AI Intelligence Analysis Analyzed: Apr 24, 2026 04:53
🇸🇦 Saudi Arabia Impact Assessment
Impact is limited to organizations using legacy TiEmu software, primarily in educational institutions (universities, technical colleges), research centers, and some government research facilities. Saudi educational sector institutions may have TiEmu deployed in mathematics and engineering departments. Risk is localized to systems where TiEmu is installed, requiring local access. No direct impact on critical infrastructure (banking, energy, telecom) unless TiEmu is used in isolated research environments within these sectors.
🏢 Affected Saudi Sectors
Education Research and Development Government Research Facilities
⚖️ Saudi Risk Score (AI)
4.2
/ 10.0
🔧 Remediation Steps (English)
Immediate Actions:
1. Inventory all systems running TiEmu 3.03 or earlier versions across the organization
2. Restrict local access to systems running TiEmu through user access controls and privilege management
3. Disable or remove TiEmu if not actively required for business operations

Patching Guidance:
- No official patch is available for this vulnerability
- Upgrade to the latest available version of TiEmu if available from upstream sources
- If upgrade is not possible, consider migrating to alternative calculator emulation software (Wabbitemu, CEmu, or other maintained alternatives)

Compensating Controls:
1. Implement strict input validation and sanitization for ROM file parameters
2. Run TiEmu in sandboxed or containerized environments to limit code execution scope
3. Apply principle of least privilege - run TiEmu with minimal required permissions
4. Monitor and log all TiEmu process executions and ROM file access
5. Implement application whitelisting to prevent unauthorized TiEmu usage

Detection Rules:
- Monitor for TiEmu process crashes or unexpected terminations
- Alert on attempts to pass oversized or malformed ROM parameters to tiemu CLI
- Track file access patterns to ROM files, especially from untrusted sources
- Monitor for stack-based code execution attempts originating from TiEmu processes
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. حصر جميع الأنظمة التي تقوم بتشغيل TiEmu 3.03 أو الإصدارات الأقدم عبر المؤسسة
2. تقييد الوصول المحلي للأنظمة التي تقوم بتشغيل TiEmu من خلال التحكم في الوصول وإدارة الامتيازات
3. تعطيل أو إزالة TiEmu إذا لم تكن مطلوبة بنشاط للعمليات التجارية

إرشادات التصحيح:
- لا يوجد تصحيح رسمي متاح لهذه الثغرة
- الترقية إلى أحدث إصدار متاح من TiEmu إن أمكن من المصادر الأصلية
- إذا لم تكن الترقية ممكنة، فكر في الهجرة إلى برامج محاكاة آلات حاسبة بديلة (Wabbitemu أو CEmu أو غيرها)

الضوابط التعويضية:
1. تطبيق التحقق الصارم من صحة المدخلات وتنظيفها لمعاملات ملفات ROM
2. تشغيل TiEmu في بيئات معزولة أو حاويات لتحديد نطاق تنفيذ الأكواد
3. تطبيق مبدأ أقل امتياز - تشغيل TiEmu بأقل الأذونات المطلوبة
4. مراقبة وتسجيل جميع عمليات TiEmu وإمكانية الوصول إلى ملفات ROM
5. تطبيق قائمة بيضاء للتطبيقات لمنع الاستخدام غير المصرح به لـ TiEmu
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
A.5.1.1 - Information security policies and procedures A.8.1.1 - User access management A.12.2.1 - Change management procedures A.12.6.1 - Management of technical vulnerabilities
🔵 SAMA CSF
ID.RA-1 - Asset management and inventory PR.AC-1 - Access control and user management PR.MA-2 - Address identified security weaknesses DE.CM-8 - Vulnerability scans
🟡 ISO 27001:2022
A.5.1 - Management direction for information security A.8.1 - User access management A.12.2 - Change management A.12.6 - Management of technical vulnerabilities and exposures
📊 CVSS Score
8.4
/ 10.0 — High
📊 CVSS Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack VectorL — Low / Local
Attack ComplexityL — Low / Local
Privileges RequiredN — None / Network
User InteractionN — None / Network
ScopeU — Unchanged
ConfidentialityH — High
IntegrityH — High
AvailabilityH — High
📋 Quick Facts
Severity High
CVSS Score8.4
CWECWE-22
EPSS0.02%
Exploit No
Patch ✗ No
Published 2026-03-28
Source Feed nvd
Views 4
🇸🇦 Saudi Risk Score
4.2
/ 10.0 — Saudi Risk
Priority: LOW
🏷️ Tags
CWE-22
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