Citrix NetScaler ADC and Gateway Out-of-Bounds Read Vulnerability
NetScaler — ADC
Insufficient input validation leading to memory overread when the NetScaler is configured as a Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) OR AAA virtual server
7.5
100.0%
Vector breakdown
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- None
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- Published
- Jun 17, 2025
- Modified
- Oct 8, 2026
- Added to KEV
- Jul 10, 2025
- Federal patch due
- Jul 11, 2025
CISA required action
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Weakness classification
Affected packages
Proof-of-concept & exploitation references
8 foundWeaponization
Public repositories whose name or description references CVE-2025-5777, found via a live GitHub search at request time. These are community-sourced signals, not a verified working exploit - cross-check each one before relying on it, and treat higher star counts and recent activity as (weak) corroboration, not proof.
- win3zz/CVE-2025-5777★ 50
CVE-2025-5777 (CitrixBleed 2) - Critical memory leak vulnerability affecting Citrix NetScaler ADC and Gateway devices
updated Sep 19, 2026
- bughuntar/CVE-2025-5777★ 31
CVE-2025-5777 Citrix NetScaler Memory Leak Exploit (CitrixBleed 2)
updated Sep 24, 2026
- mingshenhk/CitrixBleed-2-CVE-2025-5777-PoC-★ 17
详细讲解CitrixBleed 2 — CVE-2025-5777（越界泄漏）PoC 和检测套件
updated Dec 12, 2025
- Chocapikk/CVE-2025-5777★ 7
CitrixBleed 2 (CVE-2025-5777)
updated Nov 7, 2025
- soltanali0/CVE-2025-5777-Exploit★ 5
updated Sep 24, 2026
- Shivshantp/CVE-2025-5777-TrendMicro-ApexCentral-RCE★ 5
PoC for CVE-2025-5777 – Auth Bypass and RCE in Trend Micro Apex Central
updated Aug 18, 2026
- nocerainfosec/cve-2025-5777★ 3
Memory disclosure vulnerability in Citrix NetScaler ADC and Gateway when configured as a Gateway (VPN virtual server, ICA proxy, CVPN, RDP Proxy).
updated Nov 17, 2025
- ndr-repo/CVE-2025-5777★ 3
Exploit for CVE-2025-5777: Citrix NetScaler Memory Disclosure (CitrixBleed 2)
updated Apr 21, 2026
References
Frequently asked questions
What is CVE-2025-5777?
Insufficient input validation leading to memory overread when the NetScaler is configured as a Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) OR AAA virtual server
How severe is CVE-2025-5777?
CVE-2025-5777 has a CVSS base score of 7.5 out of 10 (CVSS 3.1).
Is CVE-2025-5777 actively exploited in the wild?
Yes. CVE-2025-5777 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added Jul 10, 2025, meaning CISA has confirmed evidence of active exploitation. It is also flagged as used in ransomware campaigns.
What is the EPSS score for CVE-2025-5777?
100.0% - meaning FIRST.org's EPSS model estimates a 100.0% probability this vulnerability will be exploited in the wild within 30 days (100% percentile among all scored CVEs).
Is there exploit tooling available for CVE-2025-5777?
Yes - a public Nuclei template referencing CVE-2025-5777 exist in public repositories we checked. We also found 8 public GitHub repositories referencing this CVE.
What type of vulnerability is CVE-2025-5777?
CVE-2025-5777 is classified under CWE-125, CWE-908 (CWE-125 Out-of-bounds Read).
Cross-checked against
Impactr finds and proves whether CVE-2025-5777 - or flaws like it - are actually reachable in your own web apps and APIs, with a reproducible exploit as evidence.
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