# CVE-2025-5777 (Citrix Bleed 2)

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

- Page: https://www.vulneraibility.com/cve/CVE-2025-5777
- CVSS: 7.5
- Known exploited: yes, in CISA KEV since 2025-07-10; CISA due date 2025-07-11; known ransomware use
- EPSS: 99.97%
- Public exploit code: 1 on Exploit-DB · 26 GitHub proofs of concept · 1 Nuclei template (first 2025-06-30)
- CISA SSVC: exploitation active, automatable yes, technical impact total (assessed 2026-08-04)
- Weakness: CWE-125
- Published: 2025-06-17

## Affected versions

- NetScaler ADC: affected >= 14.1 and < 43.56; >= 13.1 and < 58.32
- NetScaler Gateway: affected >= 14.1 and < 43.56; >= 13.1 and < 58.32

A version outside these ranges is not a statement that it is unaffected.

## References

- [other] https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX693420
- [advisory] https://doublepulsar.com/citrixbleed-2-exploitation-started-mid-june-how-to-spot-it-f3106392aa71
- [other] https://reliaquest.com/blog/threat-spotlight-citrix-bleed-2-vulnerability-in-netscaler-adc-gateway-devices/
- [other] https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-5777
- [other] https://www.bleepingcomputer.com/news/security/cisa-tags-citrix-bleed-2-as-exploited-gives-agencies-a-day-to-patch/
- [other] https://labs.watchtowr.com/how-much-more-must-we-bleed-citrix-netscaler-memory-disclosure-citrixbleed-2-cve-2025-5777/
- [other] https://www.theregister.com/2025/07/10/cisa_citrixbleed_kev/
- [other] https://horizon3.ai/attack-research/attack-blogs/cve-2025-5777-citrixbleed-2-write-up-maybe/
- [other] https://www.netscaler.com/blog/news/netscaler-critical-security-updates-for-cve-2025-6543-and-cve-2025-5777/
- [other] https://citrixbleed.com

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Summary, impact and action are written by the vulneraibility.com AI analysis pipeline from the CVE record, NVD, CISA and FIRST data; verify against the references.