{"id":"CVE-2025-21600","aliases":["EUVD-2025-2566","GHSA-p52f-fg64-jqxw"],"status":"published","title":"Junos OS and Junos OS Evolved: With certain BGP options enabled, receipt of specifically malformed BGP update causes RPD crash","description":"An Out-of-Bounds Read vulnerability in\n\nthe routing protocol daemon (rpd) of \n\n Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated, logically adjacent BGP peer sending a specifically malformed BGP packet to cause rpd to crash and restart, resulting in a Denial of Service (DoS). Continued receipt and processing of this packet will create a sustained Denial of Service (DoS) condition.\n\n\n\nThis issue only affects systems configured in\n      either of two ways:\n\n    \n    \n        *  systems with BGP traceoptions enabled\n\n        *  systems with BGP family traffic-engineering (BGP-LS)\n          configured\n\n\n and can be exploited from a directly connected and configured BGP peer. \n\nThis issue affects iBGP and eBGP \n\nwith \n\nany address family\n\n configured, and both IPv4 and IPv6 are affected by this vulnerability.\n\nThis issue affects:\n\nJunos OS: \n\n\n\n  *  \n\nfrom 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\n\n\nJunos OS Evolved: \n\n\n\n  *  from 21.4-EVO before 21.4R3-S9-EVO, \n  *  from 22.2-EVO before 22.2R3-S5-EVO, \n  *  from 22.3-EVO before 22.3R3-S4-EVO, \n  *  from 22.4-EVO before 22.4R3-S5-EVO, \n  *  from 23.2-EVO before 23.2R2-S3-EVO, \n  *  from 23.4-EVO before 23.4R2-S2-EVO, \n  *  from 24.2-EVO before 24.2R1-S2-EVO, 24.2R2-EVO.\n\n\nThis issue does not affect versions of Junos OS prior to 21.3R1.\n\n\nThis issue does not affect versions of Junos OS Evolved prior to 21.3R1-EVO.\n\n\n\nThis is a similar, but different vulnerability than the issue reported as CVE-2024-39516.","severity":{"version":"4.0","score":7.1,"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","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00252,"percentile":0.16772,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-125"],"published":"2025-01-09T16:49:42Z","modified":"2026-06-17T08:43:49Z","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/JSA92870","tags":["vendor-advisory","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-21600"},{"url":"https://github.com/advisories/GHSA-p52f-fg64-jqxw"}],"sources":{"cve":[{"id":"CVE-2025-21600","title":"Junos OS and Junos OS Evolved: With certain BGP options enabled, receipt of specifically malformed BGP update causes RPD crash","description":"An Out-of-Bounds Read vulnerability in\n\nthe routing protocol daemon (rpd) of \n\n Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated, logically adjacent BGP peer sending a specifically malformed BGP packet to cause rpd to crash and restart, resulting in a Denial of Service (DoS). Continued receipt and processing of this packet will create a sustained Denial of Service (DoS) condition.\n\n\n\nThis issue only affects systems configured in\n      either of two ways:\n\n    \n    \n        *  systems with BGP traceoptions enabled\n\n        *  systems with BGP family traffic-engineering (BGP-LS)\n          configured\n\n\n and can be exploited from a directly connected and configured BGP peer. \n\nThis issue affects iBGP and eBGP \n\nwith \n\nany address family\n\n configured, and both IPv4 and IPv6 are affected by this vulnerability.\n\nThis issue affects:\n\nJunos OS: \n\n\n\n  *  \n\nfrom 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\n\n\nJunos OS Evolved: \n\n\n\n  *  from 21.4-EVO before 21.4R3-S9-EVO, \n  *  from 22.2-EVO before 22.2R3-S5-EVO, \n  *  from 22.3-EVO before 22.3R3-S4-EVO, \n  *  from 22.4-EVO before 22.4R3-S5-EVO, \n  *  from 23.2-EVO before 23.2R2-S3-EVO, \n  *  from 23.4-EVO before 23.4R2-S2-EVO, \n  *  from 24.2-EVO before 24.2R1-S2-EVO, 24.2R2-EVO.\n\n\nThis issue does not affect versions of Junos OS prior to 21.3R1.\n\n\nThis issue does not affect versions of Junos OS Evolved prior to 21.3R1-EVO.\n\n\n\nThis is a similar, but different vulnerability than the issue reported as CVE-2024-39516.","status":"published","published":"2025-01-09T16:49:42.367Z","modified":"2025-01-27T22:00:26.801Z","cvss":[{"version":"4.0","score":7.1,"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","level":"high","assessor":"cna"},{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"cna"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T14:32:32.30152Z"}],"euvd":[{"id":"EUVD-2025-2566","description":"An Out-of-Bounds Read vulnerability in\n\nthe routing protocol daemon (rpd) of \n\n Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated, logically adjacent BGP peer sending a specifically malformed BGP packet to cause rpd to crash and restart, resulting in a Denial of Service (DoS). Continued receipt and processing of this packet will create a sustained Denial of Service (DoS) condition.\n\n\n\nThis issue only affects systems configured in\n      either of two ways:\n\n    \n    \n        *  systems with BGP traceoptions enabled\n\n        *  systems with BGP family traffic-engineering (BGP-LS)\n          configured\n\n\n and can be exploited from a directly connected and configured BGP peer. \n\nThis issue affects iBGP and eBGP \n\nwith \n\nany address family\n\n configured, and both IPv4 and IPv6 are affected by this vulnerability.\n\nThis issue affects:\n\nJunos OS: \n\n\n\n  *  \n\nfrom 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\n\n\nJunos OS Evolved: \n\n\n\n  *  from 21.4-EVO before 21.4R3-S9-EVO, \n  *  from 22.2-EVO before 22.2R3-S5-EVO, \n  *  from 22.3-EVO before 22.3R3-S4-EVO, \n  *  from 22.4-EVO before 22.4R3-S5-EVO, \n  *  from 23.2-EVO before 23.2R2-S3-EVO, \n  *  from 23.4-EVO before 23.4R2-S2-EVO, \n  *  from 24.2-EVO before 24.2R1-S2-EVO, 24.2R2-EVO.\n\n\nThis issue does not affect versions of Junos OS prior to 21.3R1.\n\n\nThis issue does not affect versions of Junos OS Evolved prior to 21.3R1-EVO.\n\n\n\nThis is a similar, but different vulnerability than the issue reported as CVE-2024-39516.","status":"published","published":"2025-01-09T16:49:42Z","modified":"2025-01-27T22:00:26Z","cvss":[{"version":"4.0","score":7.1,"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","level":"high"}],"updated_at":"2026-11-03T00:04:11.814906Z"}],"ghsa":[{"id":"GHSA-p52f-fg64-jqxw","title":"An Out-of-Bounds Read vulnerability in\n\nthe routing protocol daemon (rpd) of \n\n Juniper Networks...","description":"An Out-of-Bounds Read vulnerability in\n\nthe routing protocol daemon (rpd) of \n\n Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated, logically adjacent BGP peer sending a specifically malformed BGP packet to cause rpd to crash and restart, resulting in a Denial of Service (DoS). Continued receipt and processing of this packet will create a sustained Denial of Service (DoS) condition.\n\n\n\nThis issue only affects systems configured in\n      either of two ways:\n\n    \n    \n        *  systems with BGP traceoptions enabled\n\n        *  systems with BGP family traffic-engineering (BGP-LS)\n          configured\n\n\n and can be exploited from a directly connected and configured BGP peer. \n\nThis issue affects iBGP and eBGP \n\nwith \n\nany address family\n\n configured, and both IPv4 and IPv6 are affected by this vulnerability.\n\nThis issue affects:\n\nJunos OS: \n\n\n\n  *  All versions 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\n\n\nJunos OS Evolved: \n\n\n\n  *  All versions 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-S2-EVO, \n  *  from 24.2 before 24.2R1-S2-EVO, 24.2R2-EVO.\n\n\n\nThis is a similar, but different vulnerability than the issue reported as CVE-2024-39516.","status":"published","published":"2025-01-09T18:32:15Z","modified":"2025-01-09T18:32:21Z","cvss":[{"version":"4.0","score":7.1,"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/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:N/R:A/V:C/RE:M/U:Green","level":"high"},{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T14:59:26.879119Z"}],"nvd":[{"id":"CVE-2025-21600","description":"An Out-of-Bounds Read vulnerability in\n\nthe routing protocol daemon (rpd) of \n\n Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated, logically adjacent BGP peer sending a specifically malformed BGP packet to cause rpd to crash and restart, resulting in a Denial of Service (DoS). Continued receipt and processing of this packet will create a sustained Denial of Service (DoS) condition.\n\n\n\nThis issue only affects systems configured in\n      either of two ways:\n\n    \n    \n        *  systems with BGP traceoptions enabled\n\n        *  systems with BGP family traffic-engineering (BGP-LS)\n          configured\n\n\n and can be exploited from a directly connected and configured BGP peer. \n\nThis issue affects iBGP and eBGP \n\nwith \n\nany address family\n\n configured, and both IPv4 and IPv6 are affected by this vulnerability.\n\nThis issue affects:\n\nJunos OS: \n\n\n\n  *  \n\nfrom 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\n\n\nJunos OS Evolved: \n\n\n\n  *  from 21.4-EVO before 21.4R3-S9-EVO, \n  *  from 22.2-EVO before 22.2R3-S5-EVO, \n  *  from 22.3-EVO before 22.3R3-S4-EVO, \n  *  from 22.4-EVO before 22.4R3-S5-EVO, \n  *  from 23.2-EVO before 23.2R2-S3-EVO, \n  *  from 23.4-EVO before 23.4R2-S2-EVO, \n  *  from 24.2-EVO before 24.2R1-S2-EVO, 24.2R2-EVO.\n\n\nThis issue does not affect versions of Junos OS prior to 21.3R1.\n\n\nThis issue does not affect versions of Junos OS Evolved prior to 21.3R1-EVO.\n\n\n\nThis is a similar, but different vulnerability than the issue reported as CVE-2024-39516.","status":"published","published":"2025-01-09T17:15:18.96Z","modified":"2026-06-17T08:43:49.59Z","cvss":[{"version":"4.0","score":7.1,"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/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:N/R:A/V:C/RE:M/U:Green","level":"high","assessor":"secondary"},{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"secondary"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T14:10:48.373347Z"}]}}