{"id":"CVE-2026-103993","title":"An Out-of-bounds Write vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an adjacent attacker which sends a specific set of BGP communities to cause a Denial-of-Service (DoS) as r…","summary":"An Out-of-bounds Write vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an adjacent attacker which sends a specific set of BGP communities to cause a Denial-of-Service (DoS) as r…","severity":"medium","cvss":6.8,"cvssVector":"CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H","cwe":["CWE-787"],"vendor":"Juniper Networks","product":"Junos OS","affected":["junos_os < 23.2R2-S7.7","junos_os >= 23.4 < 23.4R2-S8.13","junos_os >= 24.2 < 24.2R2-S5.5","junos_os >= 24.4 < 24.4R2-S5","junos_os >= 25.2 < 25.2R2-S2","junos_os >= 25.4 < 25.4R1-S3","junos_os >= 26.2 < 26.2R1-S2","junos_os_evolved < 23.2R2-S7.7-EVO","junos_os_evolved >= 23.4 < 23.4R2-S8.11-EVO","junos_os_evolved >= 24.2 < 24.2R2-S5.6-EVO","junos_os_evolved >= 24.4 < 24.4R2-S5-EVO","junos_os_evolved >= 25.2 < 25.2R2-S2-EVO","junos_os_evolved >= 25.4 < 25.4R1-S3-EVO","junos_os_evolved >= 26.2 < 26.2R1-S2-EVO","junos_os_evolved 23.4X100","junos_os_evolved >= 25.2X100 < 25.2X100-D35-EVO","junos_os_evolved >= 25.4X300 < 25.4X300-D40-EVO"],"published":"2026-10-14","updated":"2026-10-15","sourceUpdated":"2026-10-15T16:24:19.073","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-103993","references":[{"url":"https://supportportal.juniper.net/JSA112187","label":"sirt@juniper.net"}],"tags":["nvd","cve.org"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-10-14T20:16:21.242044Z"},"ingestedAt":"2026-10-14T17:44:53.672Z","epss":0.00243,"epssPercentile":0.1539,"slug":"CVE-2026-103993","body":"## Overview\n\nAn Out-of-bounds Write vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an adjacent attacker which sends a specific set of BGP communities to cause a Denial-of-Service (DoS) as rpd crashes when graceful-shutdown sender community is added when attempting to advertise.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":37,"depthScoreParts":{"impact":37.4,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}