CVE-2025-5777 — AI Deep Analysis Summary

Q: Root Cause? (CWE/Flaw)

🔍 **Root Cause**: Insufficient input validation on the NetScaler Management Interface. ⚠️ **Flaw**: The system fails to check buffer boundaries, allowing reads beyond allocated memory limits.

Q: Who is affected? (Versions/Components)

🏢 **Affected Products**: Citrix NetScaler ADC & Citrix NetScaler Gateway. 📦 **Versions**: All versions prior to patched releases (e.g., 14.1-43.56+, 13.1-58.32+).

Q: What can hackers do? (Privileges/Data)

🕵️ **Attacker Actions**: Dump memory contents. 🔑 **Data Stolen**: Session cookies, authentication tokens, and potentially user credentials. 🚪 **Impact**: Full authentication bypass and session hijacking.

Q: Is exploitation threshold high? (Auth/Config)

⚡ **Threshold**: LOW. 🔓 **Auth**: Unauthenticated. 🎯 **Config**: Specifically affects Gateway/AAA vServer modes (VPN, ICA proxy, RDP proxy). A single crafted request triggers it.

Q: Is there a public Exp? (PoC/Wild Exploitation)

💣 **Public Exp**: YES. 📂 **PoCs**: Multiple PoCs available (e.g., 'CitrixBleed 2', 'CitrixBleed-2-CVE-2025-5777-CitrixBleed'). Wild exploitation is highly likely given the ease of use.

Q: How to self-check? (Features/Scanning)

🛡️ **Self-Check**: Use Nuclei templates (`CVE-2025-5777.yaml`). 🔎 **Scan**: Run specialized PoC scanners (e.g., `main.py -t <threads> <url>`). Check for memory leak responses indicating OOB read.

Q: Is it fixed officially? (Patch/Mitigation)

✅ **Fixed**: YES. 📅 **Patch Date**: June 17, 2025. 🔧 **Action**: Upgrade to patched builds immediately (14.1-43.56+ or 13.1-58.32+).

Q: What if no patch? (Workaround)

🚧 **No Patch?**: Isolate the management interface. 🛑 **Mitigation**: Block external access to the NetScaler Management Interface via WAF or firewall rules. Monitor for anomalous memory access patterns.

Q: Is it urgent? (Priority Suggestion)

🔥 **Urgency**: CRITICAL. ⏳ **Priority**: Immediate patching required. Unauthenticated remote code/data leak with available PoCs makes this a top-priority incident.

Updated May 06, 2026 CVSS 9.3 · Critical

This is a summary of the AI-generated 10-question deep analysis. The full version (longer answers, follow-up Q&A, related CVEs) requires login. Read the full analysis →

Q1What is this vulnerability? (Essence + Consequences)

🚨 **Essence**: Critical Out-of-Bounds Memory Read (CWE-125) in NetScaler Management Interface. <br>💥 **Consequences**: Memory overread leads to data leakage.…

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Q2Root Cause? (CWE/Flaw)

🔍 **Root Cause**: Insufficient input validation on the NetScaler Management Interface. <br>⚠️ **Flaw**: The system fails to check buffer boundaries, allowing reads beyond allocated memory limits.

Q3Who is affected? (Versions/Components)

🏢 **Affected Products**: Citrix NetScaler ADC & Citrix NetScaler Gateway. <br>📦 **Versions**: All versions prior to patched releases (e.g., 14.1-43.56+, 13.1-58.32+).

Q4What can hackers do? (Privileges/Data)

🕵️ **Attacker Actions**: Dump memory contents. <br>🔑 **Data Stolen**: Session cookies, authentication tokens, and potentially user credentials. <br>🚪 **Impact**: Full authentication bypass and session hijacking.

Q5Is exploitation threshold high? (Auth/Config)

⚡ **Threshold**: LOW. <br>🔓 **Auth**: Unauthenticated. <br>🎯 **Config**: Specifically affects Gateway/AAA vServer modes (VPN, ICA proxy, RDP proxy). A single crafted request triggers it.

Q6Is there a public Exp? (PoC/Wild Exploitation)

💣 **Public Exp**: YES. <br>📂 **PoCs**: Multiple PoCs available (e.g., 'CitrixBleed 2', 'CitrixBleed-2-CVE-2025-5777-CitrixBleed'). Wild exploitation is highly likely given the ease of use.

Q7How to self-check? (Features/Scanning)

🛡️ **Self-Check**: Use Nuclei templates (`CVE-2025-5777.yaml`). <br>🔎 **Scan**: Run specialized PoC scanners (e.g., `main.py -t <threads> <url>`). Check for memory leak responses indicating OOB read.

Q8Is it fixed officially? (Patch/Mitigation)

✅ **Fixed**: YES. <br>📅 **Patch Date**: June 17, 2025. <br>🔧 **Action**: Upgrade to patched builds immediately (14.1-43.56+ or 13.1-58.32+).

Q9What if no patch? (Workaround)

🚧 **No Patch?**: Isolate the management interface. <br>🛑 **Mitigation**: Block external access to the NetScaler Management Interface via WAF or firewall rules. Monitor for anomalous memory access patterns.

Q10Is it urgent? (Priority Suggestion)

🔥 **Urgency**: CRITICAL. <br>⏳ **Priority**: Immediate patching required. Unauthenticated remote code/data leak with available PoCs makes this a top-priority incident.

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Vulnerability detail Full AI analysis (login) NetScaler CWE-125