📄 Description (English)
An attacker may exploit the use of weak CBC-based cipher suites in the device’s SSH service to potentially observe or manipulate parts of the encrypted SSH communication, if they are able to intercept or interact with the network traffic.
🤖 AI Executive Summary
CVE-2026-1626 involves weak CBC-based cipher suites in SSH services that could allow attackers to observe or manipulate encrypted communications through network interception. With a CVSS score of 6.5 and no available patch, this vulnerability poses a medium-term risk to organizations relying on SSH for secure remote access and administrative functions. The lack of exploit availability provides a temporary window for remediation through configuration hardening.
📄 Description (Arabic)
🤖 AI Intelligence Analysis Analyzed: May 11, 2026 14:01
🇸🇦 Saudi Arabia Impact Assessment
This vulnerability primarily impacts Saudi organizations in Banking (SAMA-regulated institutions), Government (NCA, NCSC infrastructure), Energy (ARAMCO, SEC operations), and Telecom (STC, Mobily) sectors that rely on SSH for administrative access and inter-system communications. Government agencies and critical infrastructure operators face elevated risk due to their extensive use of SSH for secure remote administration. Financial institutions managing payment systems and banking networks are particularly vulnerable if CBC cipher suites remain enabled on SSH servers.
🏢 Affected Saudi Sectors
Banking and Financial Services
Government and Public Administration
Energy and Utilities
Telecommunications
Healthcare
Critical Infrastructure
🎯 MITRE ATT&CK Techniques
T1040 - Traffic Capture (network interception of SSH traffic)
T1557 - Adversary-in-the-Middle (potential MITM attacks on weak cipher suites)
T1021.4 - Remote Services: SSH (exploitation of weak SSH configurations)
T1556 - Modify Authentication Process (potential manipulation of encrypted communications)
⚖️ Saudi Risk Score (AI)
6.8
/ 10.0
🔧 Remediation Steps (English)
Immediate Actions:
1. Audit all SSH services across infrastructure to identify enabled CBC-based cipher suites (aes*-cbc, 3des-cbc)
2. Disable weak CBC cipher suites immediately via SSH configuration (sshd_config: Ciphers directive)
3. Enable only strong cipher suites: aes128-ctr, aes256-ctr, aes128-gcm@openssh.com, aes256-gcm@openssh.com
4. Implement network segmentation to restrict SSH access to trusted administrative networks
Patching Guidance:
- Monitor vendor security advisories for firmware/software updates addressing cipher suite hardening
- Prioritize patching for devices in critical infrastructure and payment processing environments
- Test configuration changes in non-production environments before deployment
Compensating Controls:
- Deploy SSH key-based authentication exclusively (disable password authentication)
- Implement SSH access logging and monitoring for anomalous connection patterns
- Use VPN or bastion hosts to restrict SSH access to authorized networks only
- Enable SSH protocol version 2 exclusively
Detection Rules:
- Monitor SSH logs for connections using CBC cipher suites (grep sshd logs for 'cbc')
- Alert on any SSH connections from unexpected source IPs
- Track failed SSH authentication attempts and implement rate limiting
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تدقيق جميع خدمات SSH عبر البنية التحتية لتحديد مجموعات التشفير CBC المفعلة (aes*-cbc, 3des-cbc)
2. تعطيل مجموعات التشفير الضعيفة CBC فوراً عبر تكوين SSH (sshd_config: توجيه Ciphers)
3. تفعيل مجموعات التشفير القوية فقط: aes128-ctr, aes256-ctr, aes128-gcm@openssh.com, aes256-gcm@openssh.com
4. تنفيذ تقسيم الشبكة لتقييد وصول SSH إلى شبكات إدارية موثوقة
إرشادات التصحيح:
- مراقبة تنبيهات أمان البائع للتحديثات التي تعالج تقوية مجموعات التشفير
- إعطاء الأولوية لتصحيح الأجهزة في البنية التحتية الحرجة وبيئات معالجة الدفع
- اختبار التغييرات في بيئات غير الإنتاج قبل النشر
الضوابط البديلة:
- نشر مصادقة SSH القائمة على المفاتيح حصراً (تعطيل مصادقة كلمة المرور)
- تنفيذ تسجيل ومراقبة وصول SSH للأنماط غير الطبيعية
- استخدام VPN أو أجهزة bastion لتقييد وصول SSH إلى الشبكات المصرح بها فقط
- تفعيل إصدار بروتوكول SSH 2 حصراً
قواعد الكشف:
- مراقبة سجلات SSH للاتصالات باستخدام مجموعات تشفير CBC
- تنبيهات على اتصالات SSH من عناوين IP غير متوقعة
- تتبع محاولات مصادقة SSH الفاشلة وتنفيذ تحديد معدل
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
ECC 2024 A.10.1.1 - Cryptographic controls and cipher suite management
ECC 2024 A.8.2.3 - Secure remote access and SSH hardening
ECC 2024 A.12.4.1 - Event logging and monitoring of SSH connections
🔵 SAMA CSF
SAMA CSF ID.BE-1 - Asset management and inventory of SSH-enabled systems
SAMA CSF PR.DS-2 - Data security and encryption standards
SAMA CSF DE.CM-1 - Detection and monitoring of anomalous SSH activity
🟡 ISO 27001:2022
ISO 27001:2022 A.10.1 - Cryptography policy and cipher suite standards
ISO 27001:2022 A.8.2 - Remote access and SSH access control
ISO 27001:2022 A.12.4 - Logging and monitoring of security events
🟣 PCI DSS v4.0.1
PCI DSS 4.1 - Strong cryptography for data in transit
PCI DSS 8.2.3 - Secure remote access mechanisms
PCI DSS 10.2 - Logging of administrative access
🔗 References & Sources 6
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https://sick.com/psirt
psirt@sick.de
https://www.cisa.gov/resources-tools/resources/ics-recommended-practices
psirt@sick.de
https://www.first.org/cvss/calculator/3.1
psirt@sick.de
https://www.sick.com/.well-known/csaf/white/2026/sca-2026-0005.json
psirt@sick.de
https://www.sick.com/.well-known/csaf/white/2026/sca-2026-0005.pdf
psirt@sick.de
https://www.sick.com/media/docs/9/19/719/special_information_sick_operating_guidelines_...
psirt@sick.de