CVE-2025-5777
HIGH Actively ExploitedNetScaler ADC and NetScaler Gateway - Insufficient input validation leading to memory overread
CVSS v3
7.5
HIGH
EPSS Score
66.7%
exploit probability
CISA KEV
No
known exploited
Exploitation
active
SSVC status
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
Technical Details
- CVSS v3 Vector
- 3.1
- Published
- 6/17/2025
- Last Modified
- 10/30/2025
Frequently Asked Questions
What is CVE-2025-5777?
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
Is CVE-2025-5777 actively exploited?
Yes. CVE-2025-5777 has been observed in active exploitation according to SSVC analysis.
What is the CVSS score for CVE-2025-5777?
CVE-2025-5777 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string 3.1.
Is CVE-2025-5777 affecting your environment?
Use isMalicious to check if any of your IPs or domains are associated with this vulnerability's IOCs.