{"id":"CVE-2025-52946","aliases":["EUVD-2025-21139","GHSA-2f8g-7hcr-fj76"],"status":"published","title":"Junos OS and Junos OS Evolved: With traceoptions enabled, receipt of malformed AS PATH causes RPD crash","description":"A Use After Free vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Juniper Networks Junos OS Evolved allows an attacker sending a BGP update with a specifically malformed AS PATH to cause rpd to crash, resulting in a Denial of Service (DoS). Continuous receipt of the malformed AS PATH attribute will cause a sustained DoS condition.\n\nOn all Junos OS and Junos OS Evolved platforms, the rpd process will crash and restart when a specifically malformed AS PATH is received within a BGP update and traceoptions are enabled.\n\nThis issue only affects systems with BGP traceoptions enabled and requires a BGP session to be already established.  Systems without BGP traceoptions enabled are not impacted by this issue.\n\n\n\nThis issue affects:\n\n Junos OS:\n\n\n\n  *  All versions before 21.2R3-S9, \n  *  all versions of 21.4,\n  *  from 22.2 before 22.2R3-S6, \n  *  from 22.4 before 22.4R3-S5, \n  *  from 23.2 before 23.2R2-S3, \n  *  from 23.4 before 23.4R2-S4, \n  *  from 24.2 before 24.2R2; \n\n\n\n\nJunos OS Evolved: \n\n\n\n  *  All versions before 22.4R3-S5-EVO, \n  *  from 23.2-EVO before 23.2R2-S3-EVO, \n  *  from 23.4-EVO before 23.4R2-S4-EVO, \n  *  from 24.2-EVO before 24.2R2-EVO.\n\n\n\n\n\n\n\nThis is a more complete fix for previously published CVE-2024-39549 (JSA83011).","severity":{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/AU:Y/R:A/V:C/RE:M","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00517,"percentile":0.44473,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-416"],"published":"2025-07-11T14:39:59Z","modified":"2026-06-17T09:37:18Z","products":[{"vendor":"juniper","product":"junos"},{"vendor":"juniper","product":"junos_os_evolved"},{"vendor":"juniper networks","product":"junos os"},{"vendor":"juniper networks","product":"junos os evolved"}],"references":[{"url":"https://supportportal.juniper.net/JSA100050","tags":["vendor-advisory","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-52946"},{"url":"https://github.com/advisories/GHSA-2f8g-7hcr-fj76"}],"sources":{"cve":[{"id":"CVE-2025-52946","title":"Junos OS and Junos OS Evolved: With traceoptions enabled, receipt of malformed AS PATH causes RPD crash","description":"A Use After Free vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Juniper Networks Junos OS Evolved allows an attacker sending a BGP update with a specifically malformed AS PATH to cause rpd to crash, resulting in a Denial of Service (DoS). Continuous receipt of the malformed AS PATH attribute will cause a sustained DoS condition.\n\nOn all Junos OS and Junos OS Evolved platforms, the rpd process will crash and restart when a specifically malformed AS PATH is received within a BGP update and traceoptions are enabled.\n\nThis issue only affects systems with BGP traceoptions enabled and requires a BGP session to be already established.  Systems without BGP traceoptions enabled are not impacted by this issue.\n\n\n\nThis issue affects:\n\n Junos OS:\n\n\n\n  *  All versions before 21.2R3-S9, \n  *  all versions of 21.4,\n  *  from 22.2 before 22.2R3-S6, \n  *  from 22.4 before 22.4R3-S5, \n  *  from 23.2 before 23.2R2-S3, \n  *  from 23.4 before 23.4R2-S4, \n  *  from 24.2 before 24.2R2; \n\n\n\n\nJunos OS Evolved: \n\n\n\n  *  All versions before 22.4R3-S5-EVO, \n  *  from 23.2-EVO before 23.2R2-S3-EVO, \n  *  from 23.4-EVO before 23.4R2-S4-EVO, \n  *  from 24.2-EVO before 24.2R2-EVO.\n\n\n\n\n\n\n\nThis is a more complete fix for previously published CVE-2024-39549 (JSA83011).","status":"published","published":"2025-07-11T14:39:59.014Z","modified":"2025-07-11T15:25:30.605Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/AU:Y/R:A/V:C/RE:M","level":"high","assessor":"cna"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-416"],"updated_at":"2026-11-02T14:32:31.631102Z"}],"euvd":[{"id":"EUVD-2025-21139","description":"A Use After Free vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Juniper Networks Junos OS Evolved allows an attacker sending a BGP update with a specifically malformed AS PATH to cause rpd to crash, resulting in a Denial of Service (DoS). Continuous receipt of the malformed AS PATH attribute will cause a sustained DoS condition.\n\nOn all Junos OS and Junos OS Evolved platforms, the rpd process will crash and restart when a specifically malformed AS PATH is received within a BGP update and traceoptions are enabled.\n\nThis issue only affects systems with BGP traceoptions enabled and requires a BGP session to be already established.  Systems without BGP traceoptions enabled are not impacted by this issue.\n\n\n\nThis issue affects:\n\n Junos OS:\n\n\n\n  *  All versions before 21.2R3-S9, \n  *  all versions of 21.4,\n  *  from 22.2 before 22.2R3-S6, \n  *  from 22.4 before 22.4R3-S5, \n  *  from 23.2 before 23.2R2-S3, \n  *  from 23.4 before 23.4R2-S4, \n  *  from 24.2 before 24.2R2; \n\n\n\n\nJunos OS Evolved: \n\n\n\n  *  All versions before 22.4R3-S5-EVO, \n  *  from 23.2-EVO before 23.2R2-S3-EVO, \n  *  from 23.4-EVO before 23.4R2-S4-EVO, \n  *  from 24.2-EVO before 24.2R2-EVO.\n\n\n\n\n\n\n\nThis is a more complete fix for previously published CVE-2024-39549 (JSA83011).","status":"published","published":"2025-07-11T14:39:59Z","modified":"2025-07-11T15:25:30Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/AU:Y/R:A/V:C/RE:M","level":"high"}],"updated_at":"2026-11-02T20:32:09.102762Z"}],"ghsa":[{"id":"GHSA-2f8g-7hcr-fj76","title":"A Use After Free vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS...","description":"A Use After Free vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Juniper Networks Junos OS Evolved allows an attacker sending a BGP update with a specifically malformed AS PATH to cause rpd to crash, resulting in a Denial of Service (DoS). Continuous receipt of the malformed AS PATH attribute will cause a sustained DoS condition.\n\nOn all Junos OS and Junos OS Evolved platforms, the rpd process will crash and restart when a specifically malformed AS PATH is received within a BGP update and traceoptions are enabled.\n\nThis issue only affects systems with BGP traceoptions enabled and requires a BGP session to be already established.  Systems without BGP traceoptions enabled are not impacted by this issue.\n\n\n\nThis issue affects:\n\n Junos OS:\n\n\n\n  *  All versions before 21.2R3-S9, \n  *  all versions of 21.4,\n  *  from 22.2 before 22.2R3-S6, \n  *  from 22.4 before 22.4R3-S5, \n  *  from 23.2 before 23.2R2-S3, \n  *  from 23.4 before 23.4R2-S4, \n  *  from 24.2 before 24.2R2; \n\n\n\n\nJunos OS Evolved: \n\n\n\n  *  All versions before 22.4R3-S5-EVO, \n  *  from 23.2-EVO before 23.2R2-S3-EVO, \n  *  from 23.4-EVO before 23.4R2-S4-EVO, \n  *  from 24.2-EVO before 24.2R2-EVO.\n\n\n\n\n\n\n\nThis is a more complete fix for previously published CVE-2024-39549 (JSA83011).","status":"published","published":"2025-07-11T15:31:37Z","modified":"2025-07-11T15:31:44Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/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:Y/R:A/V:C/RE:M/U:X","level":"high"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-416"],"updated_at":"2026-11-02T15:02:59.345355Z"}],"nvd":[{"id":"CVE-2025-52946","description":"A Use After Free vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Juniper Networks Junos OS Evolved allows an attacker sending a BGP update with a specifically malformed AS PATH to cause rpd to crash, resulting in a Denial of Service (DoS). Continuous receipt of the malformed AS PATH attribute will cause a sustained DoS condition.\n\nOn all Junos OS and Junos OS Evolved platforms, the rpd process will crash and restart when a specifically malformed AS PATH is received within a BGP update and traceoptions are enabled.\n\nThis issue only affects systems with BGP traceoptions enabled and requires a BGP session to be already established.  Systems without BGP traceoptions enabled are not impacted by this issue.\n\n\n\nThis issue affects:\n\n Junos OS:\n\n\n\n  *  All versions before 21.2R3-S9, \n  *  all versions of 21.4,\n  *  from 22.2 before 22.2R3-S6, \n  *  from 22.4 before 22.4R3-S5, \n  *  from 23.2 before 23.2R2-S3, \n  *  from 23.4 before 23.4R2-S4, \n  *  from 24.2 before 24.2R2; \n\n\n\n\nJunos OS Evolved: \n\n\n\n  *  All versions before 22.4R3-S5-EVO, \n  *  from 23.2-EVO before 23.2R2-S3-EVO, \n  *  from 23.4-EVO before 23.4R2-S4-EVO, \n  *  from 24.2-EVO before 24.2R2-EVO.\n\n\n\n\n\n\n\nThis is a more complete fix for previously published CVE-2024-39549 (JSA83011).","status":"published","published":"2025-07-11T15:15:24.823Z","modified":"2026-06-17T09:37:18.55Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/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:Y/R:A/V:C/RE:M/U:X","level":"high","assessor":"secondary"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-416"],"updated_at":"2026-11-02T14:11:18.285862Z"}]}}