CVE detail

CVE-2020-1666 — CVE-2020-1666

Published 2020-10-16 · Modified 2026-06-17 · Vendor juniper · Product junos_os_evolved · Source nvd

MEDIUM

severity

CVSS-derived band

6.6

CVSS v3

0–10 scale

0.0033

EPSS probability

exploitation probability, 30d

25.0%

EPSS percentile

percentile vs all CVEs

NOT LISTED

CISA KEV

known exploited catalog

Description

The system console configuration option 'log-out-on-disconnect' In Juniper Networks Junos OS Evolved fails to log out an active CLI session when the console cable is disconnected. This could allow a malicious attacker with physical access to the console the ability to resume a previous interactive session and possibly gain administrative privileges. This issue affects all Juniper Networks Junos OS Evolved versions after 18.4R1-EVO, prior to 20.2R1-EVO.

Remediation

vendor remediation guidance

The following software releases have been updated to resolve this specific issue: Junos OS Evolved 20.2R1-EVO and all subsequent releases.

workarounds

Limit access to the physical console to only trusted system administrators.

Product	Vulnerable range	Fixed version	Advisory
Juniper Networks Junos OS Evolved	>=unspecified<20.2R1-EVO	20.2R1-EVO	advisory ↗

References

cvedb.io · NVD · CISA KEV · FIRST EPSS · vendor advisories (CVE Program List v5). Informational only, no warranty — verify every remediation against the vendor advisory before acting on it. This product uses data from the NVD API but is not endorsed or certified by the NVD, CISA, FIRST.org or any vendor named. CVE® is a registered trademark of The MITRE Corporation.