An Out-of-bounds Write vulnerability in the SSR TCP proxy/optimization path in Juniper Networks Session Smart Router allows an attacker to corrupt forwarded packet data and potentially cause a data-plane crash via a transit TCP packet with a crafted TCP option length.
History

Sat, 07 Nov 2026 07:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Wed, 28 Oct 2026 22:15:00 +0000

Type Values Removed Values Added
First Time appeared Juniper
Juniper session Smart Router
Vendors & Products Juniper
Juniper session Smart Router

Wed, 28 Oct 2026 16:45:00 +0000

Type Values Removed Values Added
Description An Out-of-bounds Write vulnerability in the SSR TCP proxy/optimization path in Juniper Networks Session Smart Router allows an attacker to corrupt forwarded packet data and potentially cause a data-plane crash via a transit TCP packet with a crafted TCP option length.
Title Session Smart Router: An attacker-controlled TCP option causes an out-of-bounds write when using the TCP proxy feature
Weaknesses CWE-787
References
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: juniper

Published: 2026-10-28T16:33:32.354Z

Updated: 2026-11-06T18:32:25.034Z

Reserved: 2026-09-30T14:27:56.628Z

Link: CVE-2026-103391

cve-icon Vulnrichment

Updated: 2026-11-06T18:32:19.502Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-10-28T17:17:22.163

Modified: 2026-11-06T19:17:04.900

Link: CVE-2026-103391

cve-icon Redhat

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