Buffer overflow in Juniper Networks Session Smart Router
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- supportportal.juniper.net/JSA112183 (vendor-advisory)
Frequently asked questions
- What is CVE-2026-103392?
- CVE-2026-103392 is a medium-severity vulnerability in Juniper Networks Session Smart Router, classified under Out-of-bounds Write. CVSS score: 4.8/10. Published 2026-10-28.
- How severe is CVE-2026-103392?
- Medium severity. CVSS v3 base score is 4.8 out of 10.