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Vulnerabilities

CVE-2025-6543

Critical 🇺🇸 CISA KEV ⚡ Exploit Available
Citrix NetScaler ADC and Gateway Buffer Overflow Vulnerability — Citrix NetScaler ADC and Gateway contain a buffer overflow vulnerability leading to unintended control flow and Denial of Service. NetS
Published: Jun 30, 2025  ·  Source: CISA_KEV
CVSS v3
9.0
🔗 NVD Official
📄 Description (English)

Citrix NetScaler ADC and Gateway Buffer Overflow Vulnerability — Citrix NetScaler ADC and Gateway contain a buffer overflow vulnerability leading to unintended control flow and Denial of Service. NetScaler must be configured as Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) OR AAA virtual server.

🤖 AI Executive Summary

Citrix NetScaler ADC and Gateway contain a critical buffer overflow vulnerability that can lead to denial of service and unintended control flow when configured as Gateway or AAA virtual server. Attackers can exploit this vulnerability to crash services or potentially execute arbitrary code on affected systems.

📄 Description (Arabic)

ثغرة buffer overflow حرجة في Citrix NetScaler ADC و Gateway تؤثر على الأنظمة المكونة كخادم VPN Gateway أو AAA. يمكن للمهاجمين استغلال هذه الثغرة لإحداث رفض الخدمة أو التحكم غير المقصود في تدفق البرنامج. الثغرة تتطلب وصول الشبكة وتؤثر على الأنظمة المكشوفة على الإنترنت.

🤖 ملخص تنفيذي (AI)

Citrix NetScaler ADC و Gateway تحتوي على ثغرة buffer overflow حرجة قد تؤدي إلى رفض الخدمة والتحكم غير المقصود في تدفق البرنامج عند تكوينها كخادم Gateway أو AAA. يمكن للمهاجمين استغلال هذه الثغرة لإيقاف الخدمات أو تنفيذ أكواد عشوائية على الأنظمة المتأثرة.

🤖 AI Intelligence Analysis Analyzed: Apr 16, 2026 13:16
🇸🇦 Saudi Arabia Impact Assessment
Saudi Relevance: high
🏢 Affected Saudi Sectors
banking telecom energy government healthcare
🎯 MITRE ATT&CK Techniques
⚖️ Saudi Risk Score (AI)
9.0
/ 10.0
🔧 Remediation Steps (English)
Immediately apply Citrix security patches for NetScaler ADC and Gateway. Update to patched versions: 13.1-64.47, 14.1-20.373, 15.1-32.47 or later. Disable unnecessary Gateway and AAA virtual servers. Implement network segmentation to restrict access to NetScaler management interfaces. Monitor for suspicious traffic patterns and buffer overflow attempts. Conduct vulnerability scanning to identify affected instances.
🔧 خطوات المعالجة (العربية)
طبق فوراً تصحيحات أمان Citrix لـ NetScaler ADC و Gateway. قم بالترقية إلى الإصدارات المصححة: 13.1-64.47، 14.1-20.373، 15.1-32.47 أو أحدث. عطل خوادم Gateway و AAA الافتراضية غير الضرورية. طبق تقسيم الشبكة لتقييد الوصول إلى واجهات إدارة NetScaler. راقب أنماط حركة المرور المريبة ومحاولات buffer overflow. أجرِ فحص الثغرات لتحديد الحالات المتأثرة.
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
ECC-1.1 ECC-1.2 ECC-2.1 ECC-3.1
🔵 SAMA CSF
ID.BE-5 PR.DS-6 PR.IP-1 DE.CM-1
🟡 ISO 27001:2022
A.12.2.1 A.12.6.1 A.14.2.1 A.14.2.5
🔗 References & Sources 0
No references.
📦 Affected Products / CPE 1 entries
Citrix:NetScaler ADC and Gateway
📊 CVSS Score
9.0
/ 10.0 — Critical
📋 Quick Facts
Severity Critical
CVSS Score9.0
EPSS2.71%
Exploit ✓ Yes
Patch ✓ Yes
CISA KEV🇺🇸 Yes
KEV Due Date2025-07-21
Published 2025-06-30
Source Feed cisa_kev
Views 3
🇸🇦 Saudi Risk Score
9.0
/ 10.0 — Saudi Risk
Priority: CRITICAL
🏷️ Tags
kev actively-exploited
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