CVE-2025-5777

🔥 Known Exploited (CISA KEV)CRITICAL

9.3

CVSS Severity Score

EPSS Score0.0000%

EPSS Percentile0.00th

Published2025-06-17

Last Modified2026-06-17

Data SourcesNVDCISA KEV

Vulnerability Description

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

Affected Platforms (CPE)

📦

Citrix

Netscaler Application Delivery Controller

>= 12.1 and < 12.1-55.328>= 13.1 and < 13.1-37.235>= 13.1 and < 13.1-58.32>= 14.1 and < 14.1-43.56

📦

Citrix

Netscaler Gateway

>= 13.1 and < 13.1-58.32>= 14.1 and < 14.1-43.56

References & Advisories

🔗 https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX693420

🔗 https://citrixbleed.com

🔗 https://horizon3.ai/attack-research/attack-blogs/cve-2025-5777-citrixbleed-2-write-up-maybe/

🔗 https://labs.watchtowr.com/how-much-more-must-we-bleed-citrix-netscaler-memory-disclosure-citrixbleed-2-cve-2025-5777/

🔗 https://www.bleepingcomputer.com/news/security/cisa-tags-citrix-bleed-2-as-exploited-gives-agencies-a-day-to-patch/

🔗 https://www.netscaler.com/blog/news/netscaler-critical-security-updates-for-cve-2025-6543-and-cve-2025-5777/

🔗 https://www.theregister.com/2025/07/10/cisa_citrixbleed_kev/

🔗 https://doublepulsar.com/citrixbleed-2-exploitation-started-mid-june-how-to-spot-it-f3106392aa71

Vulnerability Description

Affected Platforms (CPE)

Netscaler Application Delivery Controller

Netscaler Gateway

References & Advisories

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