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Vulnerabilities

CVE-2026-32854

High ⚡ Exploit Available
LibVNCServer versions 0.9.15 and prior (fixed in commit dc78dee) contain null pointer dereference vulnerabilities in the HTTP proxy handlers within httpProcessInput() in httpd.c that allow remote atta
CWE-476 — Weakness Type
Published: Mar 24, 2026  ·  Modified: Mar 30, 2026  ·  Source: NVD
CVSS v3
7.5
🔗 NVD Official
📄 Description (English)

LibVNCServer versions 0.9.15 and prior (fixed in commit dc78dee) contain null pointer dereference vulnerabilities in the HTTP proxy handlers within httpProcessInput() in httpd.c that allow remote attackers to cause a denial of service by sending specially crafted HTTP requests. Attackers can exploit missing validation of strchr() return values in the CONNECT and GET proxy handling paths to trigger null pointer dereferences and crash the server when httpd and proxy features are enabled.

🤖 AI Executive Summary

LibVNCServer versions 0.9.15 and prior contain null pointer dereference vulnerabilities in HTTP proxy handlers that allow remote attackers to cause denial of service through specially crafted HTTP requests. The vulnerability exists in httpProcessInput() function when httpd and proxy features are enabled, affecting systems using vulnerable versions.

📄 Description (Arabic)

تحتوي LibVNCServer على ثغرات إلغاء مؤشر فارغ في معالجات وكيل HTTP بسبب عدم التحقق من قيم إرجاع دالة strchr(). يمكن للمهاجمين البعيدين إرسال طلبات HTTP معدة خصيصاً لإحداث تعطل الخادم ورفض الخدمة. تؤثر الثغرة على الأنظمة التي تستخدم الإصدارات الضعيفة مع تفعيل ميزات httpd والوكيل.

🤖 ملخص تنفيذي (AI)

إصدارات LibVNCServer 0.9.15 وما قبلها تحتوي على ثغرات إلغاء مؤشر فارغ في معالجات وكيل HTTP تسمح للمهاجمين البعيدين بإحداث رفض الخدمة من خلال طلبات HTTP معدة خصيصاً. تؤثر الثغرة على الأنظمة التي تستخدم الإصدارات الضعيفة عند تفعيل ميزات httpd والوكيل.

🤖 AI Intelligence Analysis Analyzed: May 3, 2026 06:37
🇸🇦 Saudi Arabia Impact Assessment
Saudi Relevance: medium
🏢 Affected Saudi Sectors
telecom government healthcare
🎯 MITRE ATT&CK Techniques
⚖️ Saudi Risk Score (AI)
7.0
/ 10.0
🔧 Remediation Steps (English)
Update LibVNCServer to a version after 0.9.15 that includes commit dc78dee or later. Disable HTTP proxy features if not required. Implement input validation and network-level filtering for HTTP requests. Apply vendor patches immediately and monitor for exploitation attempts targeting httpd services.
🔧 خطوات المعالجة (العربية)
قم بتحديث LibVNCServer إلى إصدار أحدث من 0.9.15 يتضمن الإصلاح. عطّل ميزات وكيل HTTP إذا لم تكن مطلوبة. طبّق التحقق من صحة المدخلات والتصفية على مستوى الشبكة. طبّق تصحيحات البائع فوراً ومراقبة محاولات الاستغلال.
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
5.1 5.2
🔵 SAMA CSF
CC.6.1 CC.6.2
🟡 ISO 27001:2022
A.12.6.1 A.14.2.1
📦 Affected Products / CPE 1 entries
libvncserver_project:libvncserver
📊 CVSS Score
7.5
/ 10.0 — High
📊 CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack VectorN — None / Network
Attack ComplexityL — Low / Local
Privileges RequiredN — None / Network
User InteractionN — None / Network
ScopeU — Unchanged
ConfidentialityN — None / Network
IntegrityN — None / Network
AvailabilityH — High
📋 Quick Facts
Severity High
CVSS Score7.5
CWECWE-476
Exploit ✓ Yes
Patch ✓ Yes
Published 2026-03-24
Source Feed nvd
Views 6
🇸🇦 Saudi Risk Score
7.0
/ 10.0 — Saudi Risk
Priority: HIGH
🏷️ Tags
exploit-available patch-available CWE-476
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