CVE-2025-5777
NetScaler ADC and NetScaler Gateway - Insufficient input validation leading to memory overread
- Published
- Jun 17, 2025
- Updated
- Oct 7, 2026
- Assigning CNA
- Citrix
- Evidence observed
- Jul 10, 2025
Primary CVSS
nvd · CVSS 4.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:XHigh · next 30 days
- Percentile
- 100.0%
- Model date
- Oct 17, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
CISA Known Exploited
This CVE appears in the CISA Known Exploited Vulnerabilities catalog.
Summary
Insufficient input validation leading to memory overread when the NetScaler is configured as a Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) OR AAA virtual server
Sources
http/cves/2025/CVE-2025-5777.yaml
Nuclei TemplatesDeclared conditions
- network: http($.protocol_keys)
- verification: dsl($.matchers[*].type)
- CVE-2025-5777Research
Advisory and technical analysis of CVE-2025-5777 (CitrixBleed 2), a critical memory disclosure in Citrix NetScaler ADC and Gateway, covering root cause, detection, and mitigation.
- CVE-2025-5777Exploit
Responsible use
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