What is CVE-2026-21913?

CVE-2026-21913 is a high-severity vulnerability in Juniper Networks Junos Os, classified under CWE-1419. CVSS score: 7.5/10. Published 2026-01-15.

How severe is CVE-2026-21913?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Juniper Networks Junos Os

CVE-2026-21913

An Incorrect Initialization of Resource vulnerability in the Internal Device Manager (IDM) of Juniper Networks Junos OS on EX4000 models allows an unauthenticated, network-based attacker to cause a Denial-of-Service (DoS). On EX4000 model…

EPSS: 0.000 (5.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Juniper Networks Junos Os — versions 24.4, 25.2, 0

Weakness classification (CWE)

CWE-1419

References

supportportal.juniper.net/JSA106014 (vendor-advisory)
kb.juniper.net/JSA106014 (vendor-advisory)

Frequently asked questions

What is CVE-2026-21913?: CVE-2026-21913 is a high-severity vulnerability in Juniper Networks Junos Os, classified under CWE-1419. CVSS score: 7.5/10. Published 2026-01-15.
How severe is CVE-2026-21913?: High severity. CVSS v3 base score is 7.5 out of 10.