← CVE Intelligence

CVE-2026-21913

Junos OS: EX4000: A high volume of traffic destined to the device leads to a crash and restart PUBLISHED

Description (CNA)

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 (CNA)

Vendor / productVersions
Juniper Networks / Junos OSaffected 24.4 before 24.4R2; affected 25.2 before 25.2R1-S2, 25.2R2; unaffected 0 before 24.4R1

CWE

CWE-1419

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.