{
  "id": "CVE-2025-5777",
  "url": "https://spydr.io/cve/CVE-2025-5777",
  "published": "2025-06-17T13:15:21.523Z",
  "modified": "2026-08-04T05:16:35.613Z",
  "score": 9.3,
  "severity": "critical",
  "cvss_version": "4.0",
  "vector": "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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
  "score_source": "citrix.com",
  "epss": 0.99972,
  "epss_percentile": 0.99978,
  "exploited": true,
  "kev": {
    "added": "2025-07-10",
    "due": "2025-07-11",
    "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.",
    "ransomware": "Known",
    "name": "Citrix NetScaler ADC and Gateway Out-of-Bounds Read Vulnerability",
    "notes": "https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX693420 ; https://nvd.nist.gov/vuln/detail/CVE-2025-5777"
  },
  "ssvc_exploitation": "active",
  "vendors": [
    "NetScaler"
  ],
  "products": [
    "NetScaler ADC",
    "NetScaler Gateway"
  ],
  "cwes": [
    "CWE-125",
    "CWE-908",
    "CWE-457"
  ],
  "description": "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",
  "status": "Analyzed",
  "score_type": "Secondary",
  "scores": {
    "cvss_v40": 9.3,
    "cvss_v31": 7.5,
    "cvss_v30": null
  },
  "references": [
    {
      "url": "https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX693420",
      "tags": [
        "Vendor Advisory"
      ]
    },
    {
      "url": "https://citrixbleed.com/",
      "tags": [
        "Broken Link",
        "Third Party Advisory"
      ]
    },
    {
      "url": "https://horizon3.ai/attack-research/attack-blogs/cve-2025-5777-citrixbleed-2-write-up-maybe/",
      "tags": [
        "Third Party Advisory"
      ]
    },
    {
      "url": "https://labs.watchtowr.com/how-much-more-must-we-bleed-citrix-netscaler-memory-disclosure-citrixbleed-2-cve-2025-5777/",
      "tags": [
        "Third Party Advisory"
      ]
    },
    {
      "url": "https://www.bleepingcomputer.com/news/security/cisa-tags-citrix-bleed-2-as-exploited-gives-agencies-a-day-to-patch/",
      "tags": [
        "Press/Media Coverage",
        "Third Party Advisory"
      ]
    },
    {
      "url": "https://www.netscaler.com/blog/news/netscaler-critical-security-updates-for-cve-2025-6543-and-cve-2025-5777/",
      "tags": [
        "Third Party Advisory"
      ]
    },
    {
      "url": "https://www.theregister.com/2025/07/10/cisa_citrixbleed_kev/",
      "tags": [
        "Press/Media Coverage"
      ]
    },
    {
      "url": "https://doublepulsar.com/citrixbleed-2-exploitation-started-mid-june-how-to-spot-it-f3106392aa71",
      "tags": [
        "Third Party Advisory"
      ]
    },
    {
      "url": "https://reliaquest.com/blog/threat-spotlight-citrix-bleed-2-vulnerability-in-netscaler-adc-gateway-devices/",
      "tags": [
        "Third Party Advisory"
      ]
    },
    {
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-5777",
      "tags": [
        "US Government Resource"
      ]
    }
  ],
  "nvd_url": "https://nvd.nist.gov/vuln/detail/CVE-2025-5777",
  "covered_in": [],
  "attribution": [
    {
      "source": "NVD",
      "url": "https://nvd.nist.gov",
      "notice": "This product uses data from the NVD API but is not endorsed or certified by the NVD."
    },
    {
      "source": "CISA KEV",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "notice": "Known exploited vulnerabilities from the CISA KEV catalog."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss",
      "notice": "Exploit prediction scores from FIRST EPSS."
    }
  ]
}