CVE detail
CVE-2025-5777: Citrix NetScaler ADC and Gateway Out-of-Bounds Read Vulnerability
Source: CISA Known Exploited Vulnerabilities catalog · back to feed
Vendor / product
Citrix · NetScaler ADC and Gateway
- Date added (KEV)
- Jul 10, 2025
- CISA due date
- Jul 11, 2025
- Ransomware campaign use
- Known
Required action
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Vendor fix: Vendor advisory
Scorifya interpretation
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Plain English
Technical detail
From CISA
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.
https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX693420 ; https://nvd.nist.gov/vuln/detail/CVE-2025-5777
See what attackers can see on your domain
This vulnerability is on CISA's Known Exploited Vulnerabilities list, so it is being exploited in the wild right now, including in ransomware campaigns. Scorifya can't test for Citrix directly, but in about 30 seconds it shows what your own domain exposes publicly across TLS, security headers, DNS, and cookies: the surface attackers probe first.
SOC 2 compliance
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- https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX693420Vendor Advisory
- https://citrixbleed.com/Broken LinkThird Party Advisory
- https://horizon3.ai/attack-research/attack-blogs/cve-2025-5777-citrixbleed-2-write-up-maybe/Third Party Advisory
- https://labs.watchtowr.com/how-much-more-must-we-bleed-citrix-netscaler-memory-disclosure-citrixbleed-2-cve-2025-5777/Third Party Advisory
- https://www.bleepingcomputer.com/news/security/cisa-tags-citrix-bleed-2-as-exploited-gives-agencies-a-day-to-patch/Press/Media CoverageThird Party Advisory
- https://www.netscaler.com/blog/news/netscaler-critical-security-updates-for-cve-2025-6543-and-cve-2025-5777/Third Party Advisory
- https://www.theregister.com/2025/07/10/cisa_citrixbleed_kev/Press/Media Coverage
- https://doublepulsar.com/citrixbleed-2-exploitation-started-mid-june-how-to-spot-it-f3106392aa71Third Party Advisory
- https://reliaquest.com/blog/threat-spotlight-citrix-bleed-2-vulnerability-in-netscaler-adc-gateway-devices/Third Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-5777US Government Resource
Other recent CVEs from Citrix
- CVE-2026-3055NetScaler, Citrix NetScaler Out-of-Bounds Read Vulnerability
- CVE-2025-7775NetScaler, Citrix NetScaler Memory Overflow Vulnerability
- CVE-2024-8068Session Recording, Citrix Session Recording Improper Privilege Management Vulnerability
- CVE-2024-8069Session Recording, Citrix Session Recording Deserialization of Untrusted Data Vulnerability
- CVE-2025-6543NetScaler ADC and Gateway, Citrix NetScaler ADC and Gateway Buffer Overflow Vulnerability