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.
Project Subscriptions
No advisories yet.
Solution
The following software releases have been updated to resolve this specific issue: 24.4R2, 25.2R1-S2, 25.2R2, 25.4R1, and all subsequent releases.
Workaround
There are no known workarounds for this issue.
Fri, 23 Jan 2026 19:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Juniper
Juniper ex4000-48mp Juniper ex4000-48p Juniper ex4000-48t Juniper junos |
|
| Weaknesses | CWE-665 | |
| CPEs | cpe:2.3:h:juniper:ex4000-48mp:-:*:*:*:*:*:*:* cpe:2.3:h:juniper:ex4000-48p:-:*:*:*:*:*:*:* cpe:2.3:h:juniper:ex4000-48t:-:*:*:*:*:*:*:* cpe:2.3:o:juniper:junos:24.4:-:*:*:*:*:*:* cpe:2.3:o:juniper:junos:24.4:r1-s2:*:*:*:*:*:* cpe:2.3:o:juniper:junos:24.4:r1-s3:*:*:*:*:*:* cpe:2.3:o:juniper:junos:24.4:r1:*:*:*:*:*:* cpe:2.3:o:juniper:junos:25.2:-:*:*:*:*:*:* cpe:2.3:o:juniper:junos:25.2:r1-s1:*:*:*:*:*:* cpe:2.3:o:juniper:junos:25.2:r1:*:*:*:*:*:* cpe:2.3:o:juniper:junos:25.2:r2:*:*:*:*:*:* |
|
| Vendors & Products |
Juniper
Juniper ex4000-48mp Juniper ex4000-48p Juniper ex4000-48t Juniper junos |
Fri, 16 Jan 2026 14:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Juniper Networks
Juniper Networks junos Os |
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| Vendors & Products |
Juniper Networks
Juniper Networks junos Os |
Thu, 15 Jan 2026 21:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
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Thu, 15 Jan 2026 20:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | 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. | |
| Title | Junos OS: EX4000: A high volume of traffic destined to the device leads to a crash and restart | |
| Weaknesses | CWE-1419 | |
| References |
| |
| Metrics |
cvssV3_1
|
Projects
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Status: PUBLISHED
Assigner: juniper
Published:
Updated: 2026-01-15T20:45:02.652Z
Reserved: 2026-01-05T17:32:48.710Z
Link: CVE-2026-21913
Updated: 2026-01-15T20:44:59.188Z
Status : Analyzed
Published: 2026-01-15T21:16:07.537
Modified: 2026-01-23T19:40:56.563
Link: CVE-2026-21913
No data.
OpenCVE Enrichment
Updated: 2026-01-16T13:42:51Z