AEGLIX vulnerability intelligence
CVE-2023-4966
CRITICAL · CVSS 9.4 · Analyzed
Published: 2023-10-10 · Updated: 2026-07-31 · Source: NVD
Vulnerability overview
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.
Severity and scoring
- CVSS score
- 9.4 · CRITICAL
- CVSS version
- 3.1
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L
- Weaknesses
- CWE-119, NVD-CWE-noinfo
CVSS measures technical severity; it does not establish whether this vulnerability is being exploited in your environment.
Known exploitation and remediation
Listed in CISA’s Known Exploited Vulnerabilities catalog.
- Affected product
- Citrix · NetScaler ADC and NetScaler Gateway
- Added to catalog
- 2023-10-18
- Required action
- Apply mitigations and kill all active and persistent sessions per vendor instructions [https://www.netscaler.com/blog/news/cve-2023-4966-critical-security-update-now-available-for-netscaler-adc-and-netscaler-gateway/] OR discontinue use of the product if mitigations are unavailable.
- CISA remediation due date
- 2023-11-08
CISA deadlines apply to the organizations covered by its directives. Confirm your own remediation requirements.
Verify affected versions and patch availability in the vendor advisory before making changes.
Affected products and versions
cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:fips:*:*:*
From (inclusive): 12.1
Before (exclusive): 12.1-55.300
cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:ndcpp:*:*:*
From (inclusive): 12.1
Before (exclusive): 12.1-55.300
cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:-:*:*:*
From (inclusive): 13.0
Before (exclusive): 13.0-92.19
cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:fips:*:*:*
From (inclusive): 13.1
Before (exclusive): 13.1-37.164
cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:-:*:*:*
From (inclusive): 13.1
Before (exclusive): 13.1-49.15
cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:-:*:*:*
From (inclusive): 14.1
Before (exclusive): 14.1-8.50
cpe:2.3:a:citrix:netscaler_gateway:*:*:*:*:*:*:*:*
From (inclusive): 13.0
Before (exclusive): 13.0-92.19
cpe:2.3:a:citrix:netscaler_gateway:*:*:*:*:*:*:*:*
From (inclusive): 13.1
Before (exclusive): 13.1-49.15
cpe:2.3:a:citrix:netscaler_gateway:*:*:*:*:*:*:*:*
From (inclusive): 14.1
Before (exclusive): 14.1-8.50
These are NVD CPE applicability entries. Some products depend on configuration conditions; consult the official record to confirm applicability.
Advisories and references
- http://packetstormsecurity.com/files/175323/Citrix-Bleed-Session-Token-Leakage-Proof-Of-Concept.html
Third Party Advisory · VDB Entry
- https://support.citrix.com/article/CTX579459
Vendor Advisory
- http://packetstormsecurity.com/files/175323/Citrix-Bleed-Session-Token-Leakage-Proof-Of-Concept.html
Third Party Advisory · VDB Entry
- https://support.citrix.com/article/CTX579459
Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-4966
US Government Resource