{
  "id": "CVE-2015-7755",
  "url": "https://spydr.io/cve/CVE-2015-7755",
  "published": "2015-12-19T14:59:01.453Z",
  "modified": "2026-06-17T00:33:04.553Z",
  "score": 9.8,
  "severity": "critical",
  "cvss_version": "3.1",
  "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
  "score_source": "NVD",
  "epss": 0.61139,
  "epss_percentile": 0.99138,
  "exploited": true,
  "kev": {
    "added": "2025-10-02",
    "due": "2025-10-23",
    "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": "Unknown",
    "name": "Juniper ScreenOS Improper Authentication Vulnerability",
    "notes": "https://supportportal.juniper.net/s/article/2015-12-Out-of-Cycle-Security-Bulletin-ScreenOS-Multiple-Security-issues-with-ScreenOS-CVE-2015-7755-CVE-2015-7756 ; https://nvd.nist.gov/vuln/detail/CVE-2015-7755"
  },
  "ssvc_exploitation": "active",
  "vendors": [
    "juniper"
  ],
  "products": [
    "juniper screenos"
  ],
  "cwes": [
    "CWE-287"
  ],
  "description": "Juniper ScreenOS 6.2.0r15 through 6.2.0r18, 6.3.0r12 before 6.3.0r12b, 6.3.0r13 before 6.3.0r13b, 6.3.0r14 before 6.3.0r14b, 6.3.0r15 before 6.3.0r15b, 6.3.0r16 before 6.3.0r16b, 6.3.0r17 before 6.3.0r17b, 6.3.0r18 before 6.3.0r18b, 6.3.0r19 before 6.3.0r19b, and 6.3.0r20 before 6.3.0r21 allows remote attackers to obtain administrative access by entering an unspecified password during a (1) SSH or (2) TELNET session.",
  "status": "Analyzed",
  "score_type": "Primary",
  "scores": {
    "cvss_v40": null,
    "cvss_v31": 9.8,
    "cvss_v30": null
  },
  "references": [
    {
      "url": "http://arstechnica.com/security/2015/12/unauthorized-code-in-juniper-firewalls-decrypts-encrypted-vpn-traffic/",
      "tags": [
        "Third Party Advisory"
      ]
    },
    {
      "url": "http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10713",
      "tags": [
        "Exploit",
        "Vendor Advisory"
      ]
    },
    {
      "url": "http://twitter.com/cryptoron/statuses/677900647560253442",
      "tags": [
        "Broken Link"
      ]
    },
    {
      "url": "http://www.forbes.com/sites/thomasbrewster/2015/12/18/juniper-says-it-didnt-work-with-government-to-add-unauthorized-code-to-network-gear/",
      "tags": [
        "Permissions Required"
      ]
    },
    {
      "url": "http://www.kb.cert.org/vuls/id/640184",
      "tags": [
        "Third Party Advisory"
      ]
    },
    {
      "url": "http://www.securityfocus.com/bid/79626",
      "tags": [
        "Broken Link"
      ]
    },
    {
      "url": "http://www.securitytracker.com/id/1034489",
      "tags": [
        "Broken Link"
      ]
    },
    {
      "url": "http://www.wired.com/2015/12/juniper-networks-hidden-backdoors-show-the-risk-of-government-backdoors/",
      "tags": [
        "Third Party Advisory"
      ]
    },
    {
      "url": "https://adamcaudill.com/2015/12/17/much-ado-about-juniper/",
      "tags": [
        "Third Party Advisory"
      ]
    },
    {
      "url": "https://forums.juniper.net/t5/Security-Incident-Response/Important-Announcement-about-ScreenOS/ba-p/285554",
      "tags": [
        "Vendor Advisory"
      ]
    },
    {
      "url": "https://github.com/hdm/juniper-cve-2015-7755",
      "tags": [
        "Third Party Advisory"
      ]
    },
    {
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2015-7755",
      "tags": [
        "US Government Resource"
      ]
    }
  ],
  "nvd_url": "https://nvd.nist.gov/vuln/detail/CVE-2015-7755",
  "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."
    }
  ]
}