Junos OS: EX4000: A high volume of traffic destined to the device leads to a crash and restart_CVE-2026-21913

{
    "lastseen": "",
    "description": "An Incorrect Initialization of Resource vulnerability in the Internal Device Manager (IDM) of Juniper Networks Junos OS on EX4000 models allows an unauthenticated, network-based attacker to cause a Denial-of-Service (DoS).\n\nOn EX4000 models with 48 ports (EX4000-48T, EX4000-48P, EX4000-48MP)\u00a0a high volume of traffic destined to the device will cause an FXPC crash and restart, which leads to a complete service outage until the device has automatically restarted.\n\n\n\n\nThe following reboot reason can be seen in the output of 'show chassis routing-engine' and as a log message:\n\n\u00a0 reason=0x4000002 reason_string=0x4000002:watchdog + panic with core dump \n\n\n\n\nThis issue affects Junos OS on EX4000-48T, EX4000-48P and EX4000-48MP:\n\n\n\n  *  24.4 versions before 24.4R2,\n  *  25.2 versions before 25.2R1-S2, 25.2R2.\n\n\n\n\nThis issue does not affect versions before 24.4R1 as the first Junos OS version for the EX4000 models was 24.4R1.",
    "published": "2026-01-15T20:25:03.276Z",
    "modified": "2026-01-15T20:45:02.652Z",
    "type": "cve",
    "title": "Junos OS: EX4000: A high volume of traffic destined to the device leads to a crash and restart",
    "source": "juniper",
    "references": "https://supportportal.juniper.net/JSA106014\nhttps://kb.juniper.net/JSA106014",
    "id": "CVE-2026-21913",
    "bulletinFamily": "",
    "cwe": [
        "CWE-1419"
    ],
    "cvelist": null,
    "sourceData": "Juniper Networks Junos OS 24.4\nJuniper Networks Junos OS 25.2",
    "sourceHref": "",
    "cvss": {
        "score": 7.5,
        "severity": "HIGH",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
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            "baseScore": 0,
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        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "Junos OS",
    "version": "24.4",
    "vendor": "Juniper Networks",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
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    "ai_score": 0
}