CVE-2026-102031 Junos OS Evolved: A low-privileged TACACS+ user causes root command execution when authorization refresh is enabled
A low-privileged TACACS+ user can execute root commands in Junos OS Evolved when authorization refresh is enabled.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-102031?
CVE-2026-102031 is a critical command injection vulnerability in Juniper Networks Junos OS Evolved, published on 14 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
An OS Command Injection vulnerability in TACACS of Juniper Networks Junos OS Evolved allows a low-privileged TACACS+-authenticated user to execute commands with root privileges when periodic TACACS+ authorization-refresh is enabled.
Weakness: CWE-78
Which versions are affected by CVE-2026-102031?
How do I fix CVE-2026-102031?
No fix has been published for CVE-2026-102031 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2026-102031 being exploited?
There is no known exploitation of CVE-2026-102031 in the wild and no public exploit code.
Sources
Also known as GHSA-m9jc-rg9m-5x3v.