Quick answers
- Is CVE-2026-102031 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-102031 being exploited in the wild.
- How severe is CVE-2026-102031?
- Critical severity, with a CVSS score of 9.8, published 14 October 2026.
- Which products and versions are affected?
- Juniper Networks Junos OS Evolved <UNKNOWN>.
- Is there a fix for CVE-2026-102031?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-102031 attacked?
- It is attacked over the network, in an operating system.
- Am I affected by CVE-2026-102031?
- Check whether you run Juniper Networks Junos OS Evolved at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
An OS command injection vulnerability in the TACACS module of Junos OS Evolved allows a TACACS+-authenticated user to execute arbitrary commands with root privileges. The vulnerability is triggered when periodic TACACS+ authorization-refresh is enabled. Attack requires valid TACACS+ authentication credentials but not administrative privileges.
Affected products
- Juniper Networks Junos OS Evolved <UNKNOWN>
Timeline
- 2026-10-14: disclosed