CVE-2026-101956 Junos OS: Unauthorized root command execution when J-Web is enabled
Unauthenticated attackers can execute arbitrary root commands on Junos OS devices if the J-Web interface 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-2026-101956?
CVE-2026-101956 is a critical authentication bypass vulnerability in Juniper Networks Junos OS, 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 Improper Authentication vulnerability in the J-Web web management component of Juniper Networks Junos OS allows an unauthenticated remote attacker to execute arbitrary Junos commands with root privileges via the exposed J-Web web interface.
Weakness: CWE-287
Which versions are affected by CVE-2026-101956?
How do I fix CVE-2026-101956?
No fix has been published for CVE-2026-101956 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-101956 being exploited?
There is no known exploitation of CVE-2026-101956 in the wild and no public exploit code.
Sources
Also known as GHSA-x4rx-8qrw-pqpw.