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CVE-2025-5777

NetScaler ADC and NetScaler Gateway - Insufficient input validation leading to memory overread

9.3 CriticalIn KEVPublic exploit

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

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
High

Exploit likelihood

100.0%Up 99.9 points since Jun 18, 2025
90%50%10%1%

What each source reports

CVE List Score used 9.3

NetScaler ADC and NetScaler Gateway - Insufficient input validation leading to memory overread

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

Record
CVE-2025-5777
CVSS 4.0
9.3 CriticalCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L
Weakness
CWE-125
Updated
2026-11-02
EUVDEUVD-2025-18497 9.3

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

Record
EUVD-2025-18497
CVSS 4.0
9.3 CriticalCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L
Updated
2026-11-02
GitHub AdvisoriesGHSA-29vj-j5w5-pcph 9.3

Insufficient input validation leading to memory overread on the NetScaler Management Interface...

Insufficient input validation leading to memory overread on the NetScaler Management Interface NetScaler ADC and NetScaler Gateway

Record
GHSA-29vj-j5w5-pcph
CVSS 4.0
9.3 CriticalCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness
CWE-125, CWE-457, CWE-908
Updated
2026-11-02
CISA KEV No score

Citrix NetScaler ADC and Gateway Out-of-Bounds Read Vulnerability

Citrix NetScaler ADC and Gateway contain an out-of-bounds read vulnerability due to insufficient input validation. This vulnerability can lead to memory overread when the NetScaler is configured as a Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) OR AAA virtual server.

Record
CVE-2025-5777
Weakness
CWE-125
Updated
2026-11-02
NVD 9.3

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

Record
CVE-2025-5777
CVSS 4.0
9.3 CriticalCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness
CWE-125, CWE-908
Updated
2026-11-02

Affected products

Public exploits

Links only. Every CVE stores no exploit code.

Public exploits
SourceLinkDate
PoC in GitHubmingshenhk/CitrixBleed-2-CVE-2025-5777-PoC-2025-06-30
PoC in GitHubRickGeex/CVE-2025-5777-CitrixBleed2025-07-04
PoC in GitHubidobarel/CVE-2025-57772025-07-05
PoC in GitHubnocerainfosec/cve-2025-57772025-07-05
PoC in GitHubRaR1991/citrix_bleed_22025-07-06
PoC in GitHuborange0Mint/CitrixBleed-2-CVE-2025-57772025-07-06
PoC in GitHubChocapikk/CVE-2025-57772025-07-08
PoC in GitHubwin3zz/CVE-2025-57772025-07-08
PoC in GitHubFrenzisRed/CVE-2025-57772025-07-09
PoC in GitHub0xgh057r3c0n/CVE-2025-57772025-07-10
Show 17 moreShow less
Public exploits
SourceLinkDate
PoC in GitHubbughuntar/CVE-2025-57772025-07-10
PoC in GitHubSleepNotF0und/CVE-2025-57772025-07-15
PoC in GitHubcyberleelawat/ExploitVeer2025-07-15
PoC in GitHubShivshantp/CVE-2025-5777-TrendMicro-ApexCentral-RCE2025-07-23
PoC in GitHubnicecopy/POC-CVE-2025-57772025-07-24
PoC in GitHubbelow0day/Honeypot-Logs-CVE-2025-57772025-07-30
PoC in GitHubsoltanali0/CVE-2025-5777-Exploit2025-08-07
Exploit-DBCitrix NetScaler ADC/Gateway 14.1 - Memory Disclosure2025-08-11
PoC in GitHubrootxsushant/Citrix-NetScaler-Memory-Leak-CVE-2025-57772025-08-11
PoC in GitHubSheep-Hunter/CVE-2025-5777-POC2025-08-20
PoC in GitHubndr-repo/CVE-2025-57772025-08-20
PoC in GitHubmr-r3b00t/CVE-2025-57772025-11-16
PoC in GitHubrashedhasan090/CVE-2025-57772025-11-23
PoC in GitHub0xBlackash/CVE-2025-57772026-03-02
PoC in GitHubsentinel-aidefense/CVE-2025-57772026-07-02
PoC in GitHubrazureink/cve-2025-5777-citrixbleed2_reproduction2026-07-23
NucleiCitrix NetScaler Memory Disclosure - CitrixBleed 2

Plus 1 more. The full list has every link.

History

History
RecordedChangedSources
exploitation
exploits, exploits_more
exploits
first indexedCVE List, EUVD, Exploit-DB, GitHub Advisories, CISA KEV, Nuclei, NVD, PoC in GitHub

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2025-5777 is a critical vulnerability (CVSS 9.3) in Citrix Netscaler Gateway, published June 17, 2025. CISA lists it as known to be exploited, since July 10, 2025. EUVD reports exploitation since July 10, 2025. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 100.0%, the 99th percentile. No source names a fixed version.

References

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