CVE-2025-5777
Citrix NetScaler ADC and Gateway Out-of-Bounds Read Vulnerability
CVSS
7.5
Alto
EPSS
100.0%
p100
KEV
SÍ
10 jul 2025
Exploit Today
80
0-100
Publicado: 17 jun 2025 · Última mod.: 4 ago 2026 · CWE-125 · CWE-908 · CWE-457
Producto
Citrix / NetScaler ADC and Gateway
Vulnerabilidad
Citrix NetScaler ADC and Gateway Out-of-Bounds Read Vulnerability
Añadido a KEV
10 jul 2025
Remediar antes de
11 jul 2025
Uso conocido en ransomware
Sí
Descripción resumida
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.
Acción requerida
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Notas
https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX693420 ; https://nvd.nist.gov/vuln/detail/CVE-2025-5777
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
- support.citrix.comhttps://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX693420
- citrixbleed.comhttps://citrixbleed.com
- horizon3.aihttps://horizon3.ai/attack-research/attack-blogs/cve-2025-5777-citrixbleed-2-write-up-maybe/
- labs.watchtowr.comhttps://labs.watchtowr.com/how-much-more-must-we-bleed-citrix-netscaler-memory-disclosure-citrixbleed-2-cve-2025-5777/
- www.bleepingcomputer.comhttps://www.bleepingcomputer.com/news/security/cisa-tags-citrix-bleed-2-as-exploited-gives-agencies-a-day-to-patch/
- www.netscaler.comhttps://www.netscaler.com/blog/news/netscaler-critical-security-updates-for-cve-2025-6543-and-cve-2025-5777/
- www.theregister.comhttps://www.theregister.com/2025/07/10/cisa_citrixbleed_kev/
- doublepulsar.comhttps://doublepulsar.com/citrixbleed-2-exploitation-started-mid-june-how-to-spot-it-f3106392aa71
- reliaquest.comhttps://reliaquest.com/blog/threat-spotlight-citrix-bleed-2-vulnerability-in-netscaler-adc-gateway-devices/
- www.cisa.govhttps://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-5777