{"cve":"CVE-2025-21602","nvd":{"published":"2025-01-09T17:15:19.150","modified":"2026-06-17T08:43:49.967","status":"Analyzed","description":"An Improper Handling of Exceptional Conditions vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated adjacent attacker sending a specific BGP update packet to cause rpd to crash and restart, resulting in a Denial of Service (DoS). \n\nContinuous receipt and processing of this packet will create a sustained Denial of Service (DoS) condition.\n\nThis issue affects iBGP and eBGP, and both IPv4 and IPv6 are affected by this vulnerability.\n\nThis issue affects Junos OS: \n\n\n\n  *  from 21.4 before 21.4R3-S9, \n  *  from 22.2 before 22.2R3-S5, \n  *  from 22.3 before 22.3R3-S4,\n  *  from 22.4 before 22.4R3-S5, \n  *  from 23.2 before 23.2R2-S3, \n  *  from 23.4 before 23.4R2-S3, \n  *  from 24.2 before 24.2R1-S2, 24.2R2; \n\n\nThis issue does not affect versions prior to 21.1R1.\n\n\n\n\n\nJunos OS Evolved: \n\n\n\n  *  from 21.4 before 21.4R3-S9-EVO, \n  *  from 22.2 before 22.2R3-S5-EVO, \n  *  from 22.3 before 22.3R3-S4-EVO,\n  *  from 22.4 before 22.4R3-S5-EVO, \n  *  from 23.2 before 23.2R2-S3-EVO, \n  *  from 23.4 before 23.4R2-S3-EVO, \n  *  from 24.2 before 24.2R1-S2-EVO, 24.2R2-EVO.\n\n\nThis issue does not affect versions prior to 21.1R1-EVO","cvss_v4":{"vector":"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/AU:N/R:A/V:C/RE:M/U:Green","score":7.1},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":6.5},"cwes":["CWE-755"],"references":["https://supportportal.juniper.net/JSA92872"],"products":["juniper:junos","juniper:junos_os_evolved"],"source":"nvd","synced_at":"2026-10-19T21:58:20.756570362+00:00"},"epss":{"cve":"CVE-2025-21602","score":0.00246,"percentile":0.1592,"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."]}