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Juniper Networks Switches Vulnerabilities & Security Advisories

8 advisories tracked · Juniper SIRT (JSA) via NVD · 0 listed in the CISA Known Exploited Vulnerabilities catalog

Every row below is a published Juniper Networks advisory that VulniPulse classified as Switches, with the CVEs, affected and fixed releases and exploitation status the vendor stated. Severity mix: 1 high, 7 medium.

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Juniper SIRT (JSA) via NVD

Juniper's advisory portal (kb.juniper.net) is a login-walled Salesforce app, so VulniPulse ingests Juniper SIRT (JSA) advisories from NVD, filtered to Juniper's own CNA (sirt@juniper.net) — official, machine-readable data with the affected Junos releases in each description. Junos on SRX/MX/EX/QFX and Junos Space are the common targets.

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Latest Juniper Switches advisories

All severitiescritical (0)high (1)medium (7)low (0)
High7.5Juniper

High [CVE-2026-21913] Incorrect Initialization of Resource vulnerability in the Internal Device Manager (IDM) of Juniper Networks Junos OS on…

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 models with 48 ports (EX4000-48T, EX4000-48P, EX4000-48MP) a high volume of traffic destined to the device will cause an FXPC crash and restart, which leads to a complete service outage until the device has automatically restarted. The following reboot reason can be seen in the output of 'show chassis routing-engine' and as a log message: reason=0x4000002 reason_string=0x4000002:watchdog + panic with core dump This issue affects Junos OS on EX4000-48T, EX4000-48P and EX4000-48MP: - 24.4 versions before 24.4R2, - 25.2 versions before 25.2R1-S2, 25.2R2. This issue does not affect versions before 24.4R1 as the first Junos OS version for the EX4000 models was 24.4R1. Affected products named by the advisory: EX.

CVE-2026-21913
EX4000
Jan 15, 2026

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