CVE-2025-5777
NetScaler ADC and NetScaler Gateway - Insufficient input validation leading to memory overread
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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
| CWE | CWE-125 |
| Vendor | netscaler |
| Product | adc |
| Published | Jun 17, 2025 |
| Last Updated | Feb 26, 2026 |
⚠️ Actively Exploited — Act Now
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Affected Versions
NetScaler / ADC
14.1 < 43.56 13.1 < 58.32
NetScaler / Gateway
14.1 < 43.56 13.1 < 58.32
References
support.citrix.com: https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX693420 doublepulsar.com: https://doublepulsar.com/citrixbleed-2-exploitation-started-mid-june-how-to-spot-it-f3106392aa71 reliaquest.com: https://reliaquest.com/blog/threat-spotlight-citrix-bleed-2-vulnerability-in-netscaler-adc-gateway-devices/ cisa.gov: https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-5777 bleepingcomputer.com: https://www.bleepingcomputer.com/news/security/cisa-tags-citrix-bleed-2-as-exploited-gives-agencies-a-day-to-patch/ labs.watchtowr.com: https://labs.watchtowr.com/how-much-more-must-we-bleed-citrix-netscaler-memory-disclosure-citrixbleed-2-cve-2025-5777/ theregister.com: https://www.theregister.com/2025/07/10/cisa_citrixbleed_kev/ horizon3.ai: https://horizon3.ai/attack-research/attack-blogs/cve-2025-5777-citrixbleed-2-write-up-maybe/ netscaler.com: https://www.netscaler.com/blog/news/netscaler-critical-security-updates-for-cve-2025-6543-and-cve-2025-5777/ citrixbleed.com: https://citrixbleed.com