{"id":"CVE-2025-59969","title":"A Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') vulnerability in the advanced forwarding toolkit (evo-aftmand/evo-pfemand) of Juniper Networks Junos OS Evolved on PTX Series or QFX5000 Series allows an unauthenti…","summary":"A Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') vulnerability in the advanced forwarding toolkit (evo-aftmand/evo-pfemand) of Juniper Networks Junos OS Evolved on PTX Series or QFX5000 Series allows an unauthenti…","severity":"medium","cvss":6.5,"cvssVector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-120"],"vendor":"juniper","product":"junos_os_evolved","affected":["junos_os_evolved < 22.4","junos_os_evolved = 22.4","junos_os_evolved = 23.2","junos_os_evolved = 23.4","junos_os_evolved = 24.2","junos_os_evolved = 24.4","junos_os_evolved = 22.2"],"patched":["junos_os_evolved 22.4"],"published":"2026-04-09","updated":"2026-09-30","sourceUpdated":"2026-09-30T22:10:00.273","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2025-59969","references":[{"url":"https://kb.juniper.net/JSA103159","label":"sirt@juniper.net"}],"tags":["nvd"],"epss":0.0018,"epssPercentile":0.06796,"ingestedAt":"2026-09-30T22:27:27.751Z","slug":"CVE-2025-59969","body":"## Overview\n\nA Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') vulnerability in the advanced forwarding toolkit (evo-aftmand/evo-pfemand) of Juniper Networks Junos OS Evolved on PTX Series or QFX5000 Series allows an unauthenticated, adjacent attacker to cause a Denial of Service (DoS).An attacker sending crafted multicast packets will cause line cards running evo-aftmand/evo-pfemand to crash and restart or non-line card devices to crash and restart. Continued receipt and processing of these packets will sustain the Denial of Service (DoS) condition.\n\nThis issue affects Junos OS Evolved PTX Series:\n\n\n\n  *  All versions before 22.4R3-S8-EVO,\n  *  from 23.2 before 23.2R2-S5-EVO,\n  *  from 23.4 before 23.4R2-EVO,\n  *  from 24.2 before 24.2R2-EVO,\n  *  from 24.4 before 24.4R2-EVO.\n\n\n\n\nThis issue affects Junos OS Evolved on QFX5000 Series:\n\n\n\n  *  22.2-EVO version before 22.2R3-S7-EVO,\n  *  22.4-EVO version before 22.4R3-S7-EVO,\n  *  23.2-EVO versions before 23.2R2-S4-EVO,\n  *  23.4-EVO versions before 23.4R2-S5-EVO, \n  *  24.2-EVO versions before 24.2R2-S1-EVO,\n  *  24.4-EVO versions before 24.4R1-S3-EVO, 24.4R2-EVO.\n\n\nThis issue does not affect Junos OS Evolved on QFX5000 Series versions before: 21.2R2-S1-EVO, 21.2R3-EVO, 21.3R2-EVO, 21.4R1-EVO, and 22.1R1-EVO.\n\n## Affected\n\n- `junos_os_evolved < 22.4`\n- `junos_os_evolved = 22.4`\n- `junos_os_evolved = 23.2`\n- `junos_os_evolved = 23.4`\n- `junos_os_evolved = 24.2`\n- `junos_os_evolved = 24.4`\n- `junos_os_evolved = 22.2`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `junos_os_evolved 22.4`","depth":"sunlit","depthScore":36,"depthScoreParts":{"impact":35.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}