Junos OS 24.4 chassisd DoS via show chassis CLI (24.4R1-S3, 24.4R2)
CVE-2026-33786 Published on April 9, 2026
Junos OS: SRX1600, SRX2300, SRX4300: When a specific show command is executed chassisd crashes
An Improper Check for Unusual or Exceptional Conditions vulnerability in the chassis control daemon (chassisd) of Juniper Networks Junos OS on SRX1600, SRX2300 and SRX4300 allows a local attacker with low privileges to cause a complete Denial of Service (DoS).
When a specific 'show chassis' CLI command is executed, chassisd crashes and restarts which causes a momentary impact to all traffic until all modules are online again.
This issue affects Junos OS on SRX1600, SRX2300 and SRX4300:
* 24.4 versions before 24.4R1-S3, 24.4R2.
This issue does not affect Junos OS versions before 24.4R1.
Vulnerability Analysis
CVE-2026-33786 is exploitable with local system access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a high impact on availability.
Weakness Type
Improper Check for Unusual or Exceptional Conditions
The software does not check or incorrectly checks for unusual or exceptional conditions that are not expected to occur frequently during day to day operation of the software.
Products Associated with CVE-2026-33786
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Affected Versions
Juniper Networks Junos OS:- Version 24.4 and below 24.4R1-S3, 24.4R2 is affected.