CVE-2026-103411

Session Smart Router: A malicious DHCP server causes information disclosure and a service crash during DHCP option parsing

Published Oct 28, 2026 CVSS 3.1 · 7.1 High EPSS < 1% KEV · Not listed
Description
An Integer Underflow vulnerability in DhcpMessageDecoder in Juniper Networks Session Smart Router allows an attacker with local network access to cause information disclosure and a denial of service via a malicious DHCP reply.

Remediation

Vendor Solution

The following software releases of Session Smart Router have been updated to resolve these specific issues: * 7.0.5 and all subsequent releases; * 7.1.7 and all subsequent releases; * 7.2.3 and all subsequent releases.


Vendor Workaround

There are no known workarounds for this issue.

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Juniper
Juniper session Smart Router
Vendors & Products Juniper
Juniper session Smart Router
Type Values Removed Values Added
Description An Integer Underflow vulnerability in DhcpMessageDecoder in Juniper Networks Session Smart Router allows an attacker with local network access to cause information disclosure and a denial of service via a malicious DHCP reply.
Title Session Smart Router: A malicious DHCP server causes information disclosure and a service crash during DHCP option parsing
Weaknesses CWE-191
References
Metrics cvssV3_1

{'score': 7.1, 'vector': 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
juniper
Published
Updated
Nov 5, 2026, 7:06 PM
Reserved
Sep 30, 2026, 2:33 PM
Status
Awaiting Analysis
Published
Oct 28, 2026, 5:17 PM
Modified
Nov 5, 2026, 7:17 PM