CVE-2025-5777 — NetScaler ADC and NetScaler Gateway - Insufficient input validation leading to memory overread

Description (CNA)

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 (CNA)

Vendor / product	Versions
NetScaler / ADC	affected 14.1 before 43.56; affected 13.1 before 58.32
NetScaler / Gateway	affected 14.1 before 43.56; affected 13.1 before 58.32

CWE

CWE-125

References

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

ADP enrichment

CISA-ADP

No English description supplied.

https://doublepulsar.com/citrixbleed-2-exploitation-started-mid-june-how-to-spot-it-f3106392aa71
https://reliaquest.com/blog/threat-spotlight-citrix-bleed-2-vulnerability-in-netscaler-adc-gateway-devices/
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-5777

CVE

No English description supplied.

https://www.bleepingcomputer.com/news/security/cisa-tags-citrix-bleed-2-as-exploited-gives-agencies-a-day-to-patch/
https://labs.watchtowr.com/how-much-more-must-we-bleed-citrix-netscaler-memory-disclosure-citrixbleed-2-cve-2025-5777/
https://www.theregister.com/2025/07/10/cisa_citrixbleed_kev/
https://horizon3.ai/attack-research/attack-blogs/cve-2025-5777-citrixbleed-2-write-up-maybe/
https://www.netscaler.com/blog/news/netscaler-critical-security-updates-for-cve-2025-6543-and-cve-2025-5777/
https://citrixbleed.com