CVE-2026-101966 Junos OS Evolved: A crafted analytics sensor resource causes telemetry dial-out daemon denial of service
An authenticated attacker can cause persistent telemetry dial-out denial of service in Junos OS Evolved by submitting a crafted analytics sensor resource.
- 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-2026-101966?
CVE-2026-101966 is a high-severity denial of service 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
A Use of Externally-Controlled Format String vulnerability in the jti-dialoutd of Juniper Networks Junos OS Evolved allows an authenticated network attacker to cause persistent telemetry dial-out denial of service via a crafted analytics sensor resource submitted through gNMI listener.
Weakness: CWE-134
Which versions are affected by CVE-2026-101966?
How do I fix CVE-2026-101966?
No fix has been published for CVE-2026-101966 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-101966 being exploited?
There is no known exploitation of CVE-2026-101966 in the wild and no public exploit code.
Sources
Also known as GHSA-xxp7-h8jc-cw8c.