CVE-2026-103411

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

State: Published
Severity: 7.1 High
Published: Oct 28, 2026
Updated: Oct 28, 2026
Reserved: Sep 30, 2026

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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.

Scores

CVSS	Score	Vector	Source
3.1	7.1 High	CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H	juniper

Weaknesses

CWE-191 Integer Underflow (Wrap or Wraparound)

Affected Products

Product	Versions
Session Smart RouterJuniper Networks	before 7.0.5Affected 7.1.0 to before 7.1.7Affected 7.2.0 to before 7.2.3Affected

References

https://supportportal.juniper.net/JSA112183vendor-advisory

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