CVE-2026-103393

Session Smart Router: An attacker can cause an out-of-bounds read during VRRP packet processing

State: Published
Severity: 4.3 Medium
Published: Oct 28, 2026
Updated: Oct 28, 2026
Reserved: Sep 30, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	4.3 Medium	CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N	juniper

Weaknesses

CWE-125 Out-of-bounds Read

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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