CVE-2025-52988: Privilege escalation to root via CLI command 'request system logout'

Automatic summary from the vendor's CVE record. We haven't written a full analysis of this vulnerability yet.

Affected and fixed versions

Product / branch	Fixed in
Junos OS 0	21.2R3-S9 or later
Junos OS 21.4	21.4R3-S8 or later
Junos OS 22.2	22.2R3-S6 or later
Junos OS 22.3	22.3R3-S3 or later
Junos OS 22.4	22.4R3-S6 or later
Junos OS 23.2	23.2R2-S1 or later
Junos OS 23.4	23.4R1-S2, 23.4R2 or later
Junos OS Evolved 0	22.4R3-S6-EVO or later
Junos OS Evolved 23.2-EVO	23.2R2-S1-EVO or later
Junos OS Evolved 23.4-EVO	23.4R1-S2-EVO, 23.4R2-EVO or later

Always confirm against the vendor advisory, which lists every fixed hotfix.

What it is

An Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') vulnerability in the CLI of Juniper Networks Junos OS and Junos OS Evolved allows a high privileged, local attacker to escalated their privileges to root.

When a user provides specifically crafted arguments to the 'request system logout' command, these will be executed as root on the shell, which can completely compromise the device. This issue affects:

Junos OS:

all versions before 21.2R3-S9,
21.4 versions before 21.4R3-S8,
22.2 versions before 22.2R3-S6,
22.3 versions before 22.3R3-S3,
22.4 versions before 22.4R3-S6,
23.2 versions before 23.2R2-S1,
23.4 versions before 23.4R1-S2, 23.4R2;

Junos OS Evolved:

all versions before 22.4R3-S6-EVO,
23.2-EVO versions before 23.2R2-S1-EVO,
23.4-EVO versions before 23.4R1-S2-EVO, 23.4R2-EVO.

Workarounds

Use access lists or firewall filters to limit access to the CLI only from trusted hosts and administrators.

Utilize CLI authorization to disallow execution of the 'request system logout' command.

Exploitation

Juniper SIRT is not aware of any malicious exploitation of this vulnerability.

KEV status, EPSS score and vendor data refreshed automatically, last on 13 Oct 2026.