CVE-2026-103392

Session Smart Router: A SACK option causes out-of-bounds memory access and TCP payload corruption when TCP sequence stitching is enabled

State: Published
Severity: 4.8 Medium
Published: Oct 28, 2026
Updated: Oct 28, 2026
Reserved: Sep 30, 2026

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Description

An Out-of-Bounds Write vulnerability in the TCP header processing in Juniper Networks Session Smart Router allows an attacker to corrupt TCP payload data and potentially cause session desynchronization via a transit TCP packet with an oversized SACK option length.

Scores

CVSS	Score	Vector	Source
3.1	4.8 Medium	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L	juniper

Weaknesses

CWE-787 Out-of-bounds Write

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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