CVE-2023-4966
CISA KEV ActiveTitle: Citrix Netscaler Gateway Memory Corruption
Memory Corruption
Proof Of Concept
PoC Available for CVE-2023-4966
CWE Category
CWE-119
Published Date
Oct 10, 2023
Modified Date
Oct 24, 2025
Exploit Status
Available
Score
9.4
CVSS v3.1
Exploit Probability (EPSS)
100.00%
Vulnerability Summary
CVE-2023-4966: Sensitive information disclosure in NetScaler ADC and NetScaler Gateway when configured as a Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) or AAA virtual server.
Impacted Vendors
Reference Links
http://packetstormsecurity.com/files/175323/Citrix-Bleed-Session-Token-Leakage-Proof-Of-Concept.html
https://support.citrix.com/article/CTX579459
http://packetstormsecurity.com/files/175323/Citrix-Bleed-Session-Token-Leakage-Proof-Of-Concept.html
https://support.citrix.com/article/CTX579459
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-4966
CVSS v3.1
Source Entity
[email protected]
Severity
CRITICAL
9.4
Attack Vector
NETWORK
Complexity
LOW
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
UNCHANGED
RAW VECTOR
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L
CVSS v3.1
Source Entity
[email protected]
Severity
HIGH
7.5
Attack Vector
NETWORK
Complexity
LOW
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
UNCHANGED
RAW VECTOR
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Associated Attack Patterns (CAPEC)
Total: PatternsNo specific attack patterns mapped.
Likelihood
Severity
Page /
CVE-2023-4966 Exploits & PoCs (Proof Of Concept)
MODIFIED
Vulnerability data or affected products updated.
PUBLISHED
Vulnerability first announced in NVD.
Attack Vector Matrix
Access Vector
NETWORK
Complexity
LOW
Privileges
N/A
Interaction
NONE
CVSS Vector String
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L
Affected Stack
No specific products linked.