What is CVE-2016-4926?

CVE-2016-4926 is a critical-severity vulnerability in Juniper Junos Space, classified under Improper Authentication. CVSS score: 9.8/10. Published 2017-03-20.

How severe is CVE-2016-4926?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Auth bypass in Juniper Junos Space

CVE-2016-4926

Insufficient authentication vulnerability in Junos Space before 15.2R2 allows remote network based users with access to Junos Space web interface to perform certain administrative tasks without authentication.

Vulnerability class: Broken Authentication

Published 2017-03-20 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.025 (84.2th percentile), scored 2026-10-21.

Low probability of exploitation in the next 30 days, but still tracked. 84th percentile — 84.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.019 · newest: 0.025 · change: +0.005

Affected products

Juniper Junos Space

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

www.securityfocus.com/bid/93540 (VDB Entry, Third Party Advisory, vdb-entry)
kb.juniper.net/InfoCenter/index (Vendor Advisory)

Frequently asked questions

What is CVE-2016-4926?: CVE-2016-4926 is a critical-severity vulnerability in Juniper Junos Space, classified under Improper Authentication. CVSS score: 9.8/10. Published 2017-03-20.
How severe is CVE-2016-4926?: Critical severity. CVSS v3 base score is 9.8 out of 10.