What is CVE-2026-103402?

CVE-2026-103402 is a high-severity vulnerability in Juniper Networks Session Smart Conductor, classified under Insufficient Verification of Data Authenticity. CVSS score: 8.8/10. Published 2026-10-28.

How severe is CVE-2026-103402?

High severity. CVSS v3 base score is 8.8 out of 10.

Vulnerability in Juniper Networks Session Smart Conductor

CVE-2026-103402

An Insufficient Verification of Data Authenticity vulnerability in PCLI in Juniper Networks Session Smart Router and Session Smart Conductor allows an attacker with write access to the model cache directory to execute arbitrary code and escalate privileges via the processing of unverified cache files.

Published 2026-10-28 · last modified 2026-10-28.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

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)

CWE-345 — Insufficient Verification of Data Authenticity

References

supportportal.juniper.net/JSA112183 (vendor-advisory)

Frequently asked questions

What is CVE-2026-103402?: CVE-2026-103402 is a high-severity vulnerability in Juniper Networks Session Smart Conductor, classified under Insufficient Verification of Data Authenticity. CVSS score: 8.8/10. Published 2026-10-28.
How severe is CVE-2026-103402?: High severity. CVSS v3 base score is 8.8 out of 10.