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VulnerabilityKnown exploited · ransomwareExploit likelihood 100%
Citrix NetScaler ADC and Gateway Out-of-Bounds Read Vulnerability
CVE-2025-5777 · CISA KEV · July 10, 2025
Summary
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.
From CISA, quoted as published. Check the source before acting.
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 required action, quoted.
Affected products
| Vendor | Product |
|---|---|
| Citrix | NetScaler ADC and Gateway |
Why it's on these mode pages
- Maritime: Vendor table: Citrix (network and remote-access gear used in every mode, all modes) (matched by rule)
- Pipeline: Vendor table: Citrix (network and remote-access gear used in every mode, all modes) (matched by rule)
- Freight rail: Vendor table: Citrix (network and remote-access gear used in every mode, all modes) (matched by rule)
- Passenger rail and transit: Vendor table: Citrix (network and remote-access gear used in every mode, all modes) (matched by rule)
- Highway and motor carrier: Vendor table: Citrix (network and remote-access gear used in every mode, all modes) (matched by rule)
- Postal and parcel: Vendor table: Citrix (network and remote-access gear used in every mode, all modes) (matched by rule)
Change history
- November 9, 2026: First collected by Watch
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