CVE ID
CVE-2025-5777
Vulnerability Name
Citrix NetScaler ADC and Gateway Out-of-Bounds Read Vulnerability
- Project: Citrix
- Product: NetScaler ADC and Gateway
Date
- Date Added: 2025-07-10
- Due Date: 2025-07-11
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.
Known To Be Used in Ransomware Campaigns?
Known
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.
Additional Notes
https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX693420 ; https://nvd.nist.gov/vuln/detail/CVE-2025-5777
Related Security News
- Citrix fixes critical NetScaler RCE flaw exploited in zero-day attacks
- Citrix Patches Three NetScaler Flaws, Confirms Active Exploitation of CVE-2025-7775
- Pennsylvania attorney general's email, site down after cyberattack
- Over 3,000 NetScaler devices left unpatched against CitrixBleed 2 bug
- Dutch NCSC Confirms Active Exploitation of Citrix NetScaler CVE-2025-6543 in Critical Sectors
- Netherlands: Citrix Netscaler flaw CVE-2025-6543 exploited to breach orgs
- Citrix Bleed 2 exploited weeks before PoCs as Citrix denied attacks
- CISA tags Citrix Bleed 2 as exploited, gives agencies a day to patch
- CISA Adds Citrix NetScaler CVE-2025-5777 to KEV Catalog as Active Exploits Target Enterprises
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