CVE-2025-5777 Known ransomware use

Citrix NetScaler ADC and Gateway Out-of-Bounds Read Vulnerability

Citrix — NetScaler ADC and Gateway

Added to KEV catalog: 10 July 2025
Federal remediation due date: 11 July 2025
Weakness classification (CWE): CWE-125

CISA 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

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

View on NVD View on MITRE CVE View full CISA catalog

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