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Vulnerabilities

CVE-2019-25570

Medium
RealTerm Serial Terminal 2.0.0.70 contains a denial of service vulnerability that allows local attackers to crash the application by supplying an excessively long string in the Port field. Attackers c
CWE-1260 — Weakness Type
Published: Mar 21, 2026  ·  Modified: Mar 24, 2026  ·  Source: NVD
CVSS v3
5.5
🔗 NVD Official
📄 Description (English)

RealTerm Serial Terminal 2.0.0.70 contains a denial of service vulnerability that allows local attackers to crash the application by supplying an excessively long string in the Port field. Attackers can paste a buffer of 1000 characters into the Port input field and click the open button to trigger a crash.

🤖 AI Executive Summary

RealTerm Serial Terminal 2.0.0.70 contains a local denial of service vulnerability triggered by excessively long input in the Port field, causing application crashes. This medium-severity vulnerability (CVSS 5.5) requires local access and has no available patch. While not remotely exploitable, it poses operational disruption risks for organizations using this serial communication tool.

📄 Description (Arabic)

🤖 AI Intelligence Analysis Analyzed: May 25, 2026 10:33
🇸🇦 Saudi Arabia Impact Assessment
Impact is limited to organizations using RealTerm Serial Terminal for industrial control systems, SCADA monitoring, or serial device management. Most at-risk sectors include: Energy (ARAMCO facilities using legacy serial communications), Healthcare (medical device serial interfaces), Government (critical infrastructure monitoring), and Telecommunications (network equipment management). The vulnerability enables local denial of service, disrupting monitoring and control operations in these sectors.
🏢 Affected Saudi Sectors
Energy (ARAMCO) Government Healthcare Telecommunications (STC) Industrial Control Systems Critical Infrastructure
⚖️ Saudi Risk Score (AI)
4.2
/ 10.0
🔧 Remediation Steps (English)
Immediate Actions:
1. Identify all systems running RealTerm Serial Terminal 2.0.0.70 and document their criticality
2. Restrict local access to affected systems through physical and logical controls
3. Implement application whitelisting to prevent unauthorized execution

Compensating Controls:
1. Monitor process crashes and implement alerting for RealTerm application failures
2. Implement input validation at the application wrapper level if possible
3. Use alternative serial terminal software (PuTTY, Tera Term, or commercial alternatives) where feasible
4. Restrict user permissions to prevent malicious input attempts
5. Implement application sandboxing or containerization

Detection Rules:
1. Monitor for RealTerm.exe crashes with event ID 1000 (Application Error)
2. Alert on repeated failed Port field input attempts
3. Track process termination events for RealTerm with exit code indicating buffer overflow
4. Log all Port field modifications through system auditing
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تحديد جميع الأنظمة التي تقوم بتشغيل RealTerm Serial Terminal 2.0.0.70 وتوثيق أهميتها
2. تقييد الوصول المحلي للأنظمة المتأثرة من خلال الضوابط المادية والمنطقية
3. تنفيذ قائمة بيضاء للتطبيقات لمنع التنفيذ غير المصرح به

الضوابط البديلة:
1. مراقبة أعطال العمليات وتنفيذ التنبيهات لفشل تطبيق RealTerm
2. تنفيذ التحقق من صحة الإدخال على مستوى غلاف التطبيق إن أمكن
3. استخدام برامج طرفية تسلسلية بديلة (PuTTY أو Tera Term أو بدائل تجارية)
4. تقييد أذونات المستخدم لمنع محاولات الإدخال الضارة
5. تنفيذ عزل التطبيقات أو الحاويات

قواعد الكشف:
1. مراقبة أعطال RealTerm.exe مع معرف الحدث 1000
2. التنبيه على محاولات إدخال حقل المنفذ المتكررة الفاشلة
3. تتبع أحداث إنهاء العملية لـ RealTerm
4. تسجيل جميع تعديلات حقل المنفذ من خلال تدقيق النظام
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
ECC 2024 A.5.1.1 - Information security policies and procedures ECC 2024 A.5.2.1 - Access control and user management ECC 2024 A.12.2.1 - Change management procedures
🔵 SAMA CSF
SAMA CSF ID.BE-1 - Business Environment SAMA CSF PR.AC-1 - Access Control SAMA CSF DE.CM-1 - Detection and Analysis
🟡 ISO 27001:2022
ISO 27001:2022 A.5.1 - Policies for information security ISO 27001:2022 A.8.1 - User access management ISO 27001:2022 A.12.6 - Change management
📊 CVSS Score
5.5
/ 10.0 — Medium
📊 CVSS Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Attack VectorL — Low / Local
Attack ComplexityL — Low / Local
Privileges RequiredN — None / Network
User InteractionR — Required
ScopeU — Unchanged
ConfidentialityN — None / Network
IntegrityN — None / Network
AvailabilityH — High
📋 Quick Facts
Severity Medium
CVSS Score5.5
CWECWE-1260
Exploit No
Patch ✗ No
Published 2026-03-21
Source Feed nvd
Views 4
🇸🇦 Saudi Risk Score
4.2
/ 10.0 — Saudi Risk
Priority: MEDIUM
🏷️ Tags
CWE-1260
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