---
cve: "CVE-2025-5777"
severity: "CRITICAL"
cvss: 9.3
epss: "100%"
vendor: "NetScaler"
kev: true
exploited: true
published: "2025-06-17 13:15:21"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-09-04T02:49:23+02:00"
---

# CVE-2025-5777

> 9.3 CRITICAL · ⚠️ CISA KEV (421 Tage) · 🔓 Exploited

## Beschreibung

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

## CVSS-Vektor

```
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |

## Exploit-Evidenz

- [EDB-52401 — Citrix NetScaler ADC/Gateway 14.1 - Memory Disclosure](https://www.exploit-db.com/exploits/52401)

## Referenzen

- <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>
- <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>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2025-5777) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_