{"id":"CVE-2025-21593","aliases":["EUVD-2025-2562","GHSA-3wvw-m4vx-cj7h"],"status":"published","title":"Junos OS and Junos OS Evolved: On SRv6 enabled devices, an attacker sending a malformed BGP update can cause the rpd to crash","description":"An Improper Control of a Resource Through its Lifetime vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated network-based attacker to cause a Denial-of-Service (DoS).\n\nOn devices with SRv6 (Segment Routing over IPv6) enabled, an attacker can send a malformed BGP UPDATE packet which will cause the rpd to crash and restart. Continued receipt of these UPDATE packets will cause a sustained DoS condition. \n\nThis issue affects iBGP and eBGP, and both IPv4 and IPv6 are affected by this vulnerability.This issue affects Junos OS: \n\n\n\n  *  All versions before 21.2R3-S9, \n  *  from 21.4 before 21.4R3-S10, \n  *  from 22.2 before 22.2R3-S5, \n  *  from 22.3 before 22.3R3-S4, \n  *  from 22.4 before 22.4R3-S3, \n  *  from 23.2 before 23.2R2-S2, \n  *  from 23.4 before 23.4R2;\n\n\n\nand Junos OS Evolved: \n\n\n\n  *  All versions before 21.2R3-S9-EVO, \n  *  from 21.4-EVO before 21.4R3-S10-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-S3-EVO,\n  *  from 23.2-EVO before 23.2R2-S2-EVO, \n  *  from 23.4-EVO before 23.4R2-EVO.","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:N/R:A","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00246,"percentile":0.15998,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-664"],"published":"2025-01-09T16:41:09Z","modified":"2026-06-17T08:43:48Z","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/JSA92861","tags":["vendor-advisory","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-21593"},{"url":"https://github.com/advisories/GHSA-3wvw-m4vx-cj7h"}],"sources":{"cve":[{"id":"CVE-2025-21593","title":"Junos OS and Junos OS Evolved: On SRv6 enabled devices, an attacker sending a malformed BGP update can cause the rpd to crash","description":"An Improper Control of a Resource Through its Lifetime vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated network-based attacker to cause a Denial-of-Service (DoS).\n\nOn devices with SRv6 (Segment Routing over IPv6) enabled, an attacker can send a malformed BGP UPDATE packet which will cause the rpd to crash and restart. Continued receipt of these UPDATE packets will cause a sustained DoS condition. \n\nThis issue affects iBGP and eBGP, and both IPv4 and IPv6 are affected by this vulnerability.This issue affects Junos OS: \n\n\n\n  *  All versions before 21.2R3-S9, \n  *  from 21.4 before 21.4R3-S10, \n  *  from 22.2 before 22.2R3-S5, \n  *  from 22.3 before 22.3R3-S4, \n  *  from 22.4 before 22.4R3-S3, \n  *  from 23.2 before 23.2R2-S2, \n  *  from 23.4 before 23.4R2;\n\n\n\nand Junos OS Evolved: \n\n\n\n  *  All versions before 21.2R3-S9-EVO, \n  *  from 21.4-EVO before 21.4R3-S10-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-S3-EVO,\n  *  from 23.2-EVO before 23.2R2-S2-EVO, \n  *  from 23.4-EVO before 23.4R2-EVO.","status":"published","published":"2025-01-09T16:41:09.326Z","modified":"2025-01-09T19:22:40.654Z","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:N/R:A","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-664"],"updated_at":"2026-11-02T14:32:32.30152Z"}],"euvd":[{"id":"EUVD-2025-2562","description":"An Improper Control of a Resource Through its Lifetime vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated network-based attacker to cause a Denial-of-Service (DoS).\n\nOn devices with SRv6 (Segment Routing over IPv6) enabled, an attacker can send a malformed BGP UPDATE packet which will cause the rpd to crash and restart. Continued receipt of these UPDATE packets will cause a sustained DoS condition. \n\nThis issue affects iBGP and eBGP, and both IPv4 and IPv6 are affected by this vulnerability.This issue affects Junos OS: \n\n\n\n  *  All versions before 21.2R3-S9, \n  *  from 21.4 before 21.4R3-S10, \n  *  from 22.2 before 22.2R3-S5, \n  *  from 22.3 before 22.3R3-S4, \n  *  from 22.4 before 22.4R3-S3, \n  *  from 23.2 before 23.2R2-S2, \n  *  from 23.4 before 23.4R2;\n\n\n\nand Junos OS Evolved: \n\n\n\n  *  All versions before 21.2R3-S9-EVO, \n  *  from 21.4-EVO before 21.4R3-S10-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-S3-EVO,\n  *  from 23.2-EVO before 23.2R2-S2-EVO, \n  *  from 23.4-EVO before 23.4R2-EVO.","status":"published","published":"2025-01-09T16:41:09Z","modified":"2025-01-09T19:22:40Z","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:N/R:A","level":"high"}],"updated_at":"2026-11-03T00:04:22.603579Z"}],"ghsa":[{"id":"GHSA-3wvw-m4vx-cj7h","title":"An Improper Control of a Resource Through its Lifetime vulnerability in the routing protocol...","description":"An Improper Control of a Resource Through its Lifetime vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated network-based attacker to cause a Denial-of-Service (DoS).\n\nOn devices with SRv6 (Segment Routing over IPv6) enabled, an attacker can send a malformed BGP UPDATE packet which will cause the rpd to crash and restart. Continued receipt of these UPDATE packets will cause a sustained DoS condition. \n\nThis issue affects iBGP and eBGP, and both IPv4 and IPv6 are affected by this vulnerability.This issue affects Junos OS: \n\n\n\n  *  All versions before 21.2R3-S9, \n  *  from 21.4 before 21.4R3-S10, \n  *  from 22.2 before 22.2R3-S5, \n  *  from 22.3 before 22.3R3-S4, \n  *  from 22.4 before 22.4R3-S3, \n  *  from 23.2 before 23.2R2-S2, \n  *  from 23.4 before 23.4R2;\n\n\n\nand Junos OS Evolved: \n\n\n\n  *  All versions before 21.2R3-S9-EVO, \n  *  from 21.4-EVO before 21.4R3-S10-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-S3-EVO,\n  *  from 23.2-EVO before 23.2R2-S2-EVO, \n  *  from 23.4-EVO before 23.4R2-EVO.","status":"published","published":"2025-01-09T18:32:15Z","modified":"2025-01-09T18:32:22Z","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:N/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:X/R:A/V:X/RE:X/U:X","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-664"],"updated_at":"2026-11-02T14:59:26.879119Z"}],"nvd":[{"id":"CVE-2025-21593","description":"An Improper Control of a Resource Through its Lifetime vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated network-based attacker to cause a Denial-of-Service (DoS).\n\nOn devices with SRv6 (Segment Routing over IPv6) enabled, an attacker can send a malformed BGP UPDATE packet which will cause the rpd to crash and restart. Continued receipt of these UPDATE packets will cause a sustained DoS condition. \n\nThis issue affects iBGP and eBGP, and both IPv4 and IPv6 are affected by this vulnerability.This issue affects Junos OS: \n\n\n\n  *  All versions before 21.2R3-S9, \n  *  from 21.4 before 21.4R3-S10, \n  *  from 22.2 before 22.2R3-S5, \n  *  from 22.3 before 22.3R3-S4, \n  *  from 22.4 before 22.4R3-S3, \n  *  from 23.2 before 23.2R2-S2, \n  *  from 23.4 before 23.4R2;\n\n\n\nand Junos OS Evolved: \n\n\n\n  *  All versions before 21.2R3-S9-EVO, \n  *  from 21.4-EVO before 21.4R3-S10-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-S3-EVO,\n  *  from 23.2-EVO before 23.2R2-S2-EVO, \n  *  from 23.4-EVO before 23.4R2-EVO.","status":"published","published":"2025-01-09T17:15:18.38Z","modified":"2026-06-17T08:43:48.33Z","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:N/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:X/R:A/V:X/RE:X/U:X","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-664"],"updated_at":"2026-11-02T14:10:48.373347Z"}]}}