{"cve":"CVE-2024-21586","nvd":{"published":"2024-07-01T17:15:05.193","modified":"2026-06-17T07:09:46.070","status":"Analyzed","description":"An Improper Check for Unusual or Exceptional Conditions vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS on SRX Series and NFX Series allows an unauthenticated, network-based attacker to cause a Denial-of-Service (DoS).\n\nIf an affected device receives specific valid traffic destined to the device, it will cause the PFE to crash and restart.  Continued receipt and processing of this traffic will create a sustained DoS condition.\n\nThis issue affects Junos OS on SRX Series:\n\n  *  21.4 versions before 21.4R3-S7.9,\n  *  22.1 versions before 22.1R3-S5.3,\n  *  22.2 versions before 22.2R3-S4.11,\n  *  22.3 versions before 22.3R3,\n  *  22.4 versions before 22.4R3.\n\n\n\n\n\n\nThis issue affects Junos OS on NFX Series:\n\n  *  21.4 versions before 21.4R3-S8,\n  *  22.1 versions after 22.1R1,\n  *  22.2 versions before 22.2R3-S5,\n  *  22.3 versions before 22.3R3,\n  *  22.4 versions before 22.4R3.\n\n\n\n\n\n\nJunos OS versions prior to 21.4R1 are not affected by this issue.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":["CWE-754"],"references":["https://supportportal.juniper.net/JSA83195","https://supportportal.juniper.net/JSA83195"],"products":["juniper:junos"],"source":"nvd","synced_at":"2026-10-19T21:52:00.836172422+00:00"},"epss":{"cve":"CVE-2024-21586","score":0.00499,"percentile":0.42755,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}