CVE-2026-102031 Juniper Networks Junos OS Evolved - OS Command Injection

Juniper Networks Junos OS Evolved contains an OS command injection caused by improper handling in TACACS, letting low-privileged TACACS+-authenticated users execute commands with root privileges when periodic TACACS+ authorization-refresh is enabled.

CVSS base score 9.8 /10
Critical
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
View the NVD record ↗

Details

Type
OS Command Injection
Impact
Remote Code Execution, Privilege Escalation
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
14 October 2026
Updated
15 October 2026
Weakness
CWE-78

Vendor fix

Update to the latest Junos OS Evolved version with the fix applied.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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