CVE-2025-6543

EUVD-2025-19085
Memory overflow vulnerability leading to unintended control flow and Denial of Service in NetScaler ADC and NetScaler Gateway when configured as Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) OR AAA virtual server
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
9.8 CRITICAL
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 86%
Affected Products (NVD)
VendorProductVersion
citrixnetscaler_application_delivery_controller
13.1 ≤
𝑥
< 13.1-37.236
citrixnetscaler_application_delivery_controller
13.1 ≤
𝑥
< 13.1-37.236
citrixnetscaler_application_delivery_controller
13.1 ≤
𝑥
< 13.1-59.19
citrixnetscaler_application_delivery_controller
14.1 ≤
𝑥
< 14.1-47.46
citrixnetscaler_gateway
13.1 ≤
𝑥
< 13.1-59.19
citrixnetscaler_gateway
14.1 ≤
𝑥
< 14.1-47.46
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX694788
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-6543