CVE-2025-5777 — Citrix NetScaler ADC and Gateway Out-of-Bounds Read Vulnerability
CVE-2025-5777: Citrix NetScaler ADC and Gateway Out-of-Bounds Read Vulnerability
CISA Known Exploited Vulnerability (KEV)
| Vendor / project | Citrix |
| Product | NetScaler ADC and Gateway |
| Date added | 2025-07-10 |
| Due date | 2025-07-11 |
| Ransomware campaign use | Known |
Description
Citrix NetScaler ADC and Gateway contain an out-of-bounds read vulnerability due to insufficient input validation. This vulnerability can lead to memory overread when the NetScaler is configured as a Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) OR AAA virtual server.
Required action (CISA)
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Notes
https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX693420 ; https://nvd.nist.gov/vuln/detail/CVE-2025-5777
References
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-5777
- KEV catalog: https://www.cisa.gov/known-exploited-vulnerabilities-catalog