CVE-2026-103392

MEDIUMCVSS 4.8/10

Last modified

CVE-2026-103392 is a medium-severity vulnerability rated 4.8/10 on the CVSS scale. 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..

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.

Metrics

Weakness Enumeration

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
Juniper NetworksSession Smart Router< 7.0.5; >= 7.1.0, < 7.1.7; >= 7.2.0, < 7.2.3

References

Timeline

Published
Last Modified
Status
Awaiting Analysis

Frequently Asked Questions

What is CVE-2026-103392?
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.
How severe is CVE-2026-103392?
CVE-2026-103392 has a CVSS score of 4.8/10 (MEDIUM severity).
How do I fix CVE-2026-103392?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST