CVE-2025-5777 · netVigilance record NV25-0140
Citrix NetScaler ADC and Gateway Out-of-Bounds Read
past due ransomware
What to do
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 deadline 2025-07-11 · passed 1 year 1 month ago · applies to US federal civilian agencies; used elsewhere as a reference SLA
What happened
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.
Who is affected
Citrix NetScaler ADC and Gateway. Affected version ranges are listed in the vendor advisory and the NVD entry linked under Sources.
Weakness class: CWE-125.
Timeline
- Added to CISA KEVExploitation in the wild confirmed by CISA
- CISA remediation deadlinepassed 1 year 1 month ago
Sources
- NVD entry for CVE-2025-5777 nvd.nist.gov/vuln/detail/CVE-2025-5777
- CISA Known Exploited Vulnerabilities catalog www.cisa.gov/known-exploited-vulnerabilities-catalog
- support.citrix.com support.citrix.com/support-home/kbsearch/article?articleNumber=CTX693420
- nvd.nist.gov nvd.nist.gov/vuln/detail/CVE-2025-5777