{"id":"CVE-2026-103393","title":"Session Smart Router: An attacker can cause an out-of-bounds read during VRRP packet processing","summary":"An Out-of-Bounds Read vulnerability in the VRRP implementation in Juniper Networks Session Smart Router allows an L2-adjacent attacker to read stale memory contents or cause a system fault via a specially crafted VRRPv3 advertisement.","severity":"medium","cvss":4.3,"cvssVector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","cvssSource":"cna","cwe":["CWE-125"],"vendor":"Juniper Networks","product":"Session Smart Router","affected":["session_smart_router < 7.0.5","session_smart_router >= 7.1.0 < 7.1.7","session_smart_router >= 7.2.0 < 7.2.3"],"published":"2026-10-28","updated":"2026-10-28","sourceUpdated":"2026-10-28T16:34:00.167Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-103393","references":[{"url":"https://supportportal.juniper.net/JSA112183"}],"tags":["cve.org"],"ingestedAt":"2026-10-28T17:14:44.484Z","slug":"CVE-2026-103393","body":"## Overview\n\nAn Out-of-Bounds Read vulnerability in the VRRP implementation in Juniper Networks Session Smart Router allows an L2-adjacent attacker to read stale memory contents or cause a system fault via a specially crafted VRRPv3 advertisement.\n\n## Affected\n\n- `session_smart_router < 7.0.5`\n- `session_smart_router >= 7.1.0 < 7.1.7`\n- `session_smart_router >= 7.2.0 < 7.2.3`\n\n## Remediation\n\nThe following software releases of Session Smart Router have been updated to resolve these specific issues:\n  *  7.0.5 \n\nand all subsequent releases;\n  *  7.1.7 \n\nand all subsequent releases;\n  *  7.2.3 and all subsequent releases.\n\n### Workarounds\n\nThere are no known workarounds for this issue.","depth":"sunlit","depthScore":24,"depthScoreParts":{"impact":23.7,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}