What is CVE-2026-101966?

CVE-2026-101966 is a high-severity vulnerability in Juniper Networks Junos OS Evolved, classified under Use of Externally-Controlled Format String. CVSS score: 8.2/10. Published 2026-10-14.

How severe is CVE-2026-101966?

High severity. CVSS v3 base score is 8.2 out of 10.

Vulnerability in Juniper Networks Junos OS Evolved

CVE-2026-101966

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.

Published 2026-10-14 · last modified 2026-10-14.

CVSS v3 metric

CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Juniper Networks Junos OS Evolved — versions 23.4X100

Weakness classification (CWE)

CWE-134 — Use of Externally-Controlled Format String

References

supportportal.juniper.net/JSA112250 (vendor-advisory)

Frequently asked questions

What is CVE-2026-101966?: CVE-2026-101966 is a high-severity vulnerability in Juniper Networks Junos OS Evolved, classified under Use of Externally-Controlled Format String. CVSS score: 8.2/10. Published 2026-10-14.
How severe is CVE-2026-101966?: High severity. CVSS v3 base score is 8.2 out of 10.