CVE-2025-5777
HighActively exploited (CISA KEV)Known to be used in ransomware campaigns
Description
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
SeverityHigh
CVSS7.5
Exploit probability—
Product
Citrix NetScaler ADC and Gateway
PublishedJun 17, 2025
First seenJun 17, 2025
Added to KEVJul 10, 2025
Weakness typeCWE-125Out-of-bounds read
How to fix
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.
CISA due date: Jul 11, 2025Update
- citrix netscaler_application_delivery_controller12.1-55.328, 13.1-37.235, 13.1-58.32, 14.1-43.56 or later
- citrix netscaler_gateway13.1-58.32, 14.1-43.56 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| citrix netscaler_application_delivery_controller | 12.1 ≤ v < 12.1-55.328, 13.1 ≤ v < 13.1-37.235, 13.1 ≤ v < 13.1-58.32, 14.1 ≤ v < 14.1-43.56 | 12.1-55.328, 13.1-37.235, 13.1-58.32, 14.1-43.56 |
| citrix netscaler_gateway | 13.1 ≤ v < 13.1-58.32, 14.1 ≤ v < 14.1-43.56 | 13.1-58.32, 14.1-43.56 |
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