SB2026050812 - Local denial of service in Junos OS CLI on SRX1600, SRX2300 and SRX4300 devices

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Main Vulnerability Database SB2026050812

SB2026050812 - Local denial of service in Junos OS CLI on SRX1600, SRX2300 and SRX4300 devices

Published: May 8, 2026

Security Bulletin ID SB2026050812
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Denial of service

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Improper Check for Unusual or Exceptional Conditions (CVE-ID: CVE-2026-33786)

CWE-ID: CWE-754 - Improper Check for Unusual or Exceptional Conditions

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to improper check for unusual or exceptional conditions in the chassis control daemon (chassisd) when executing a specific 'show chassis' CLI command. A local user can execute the crafted command to cause a denial of service.

The daemon crash and restart causes a momentary impact to traffic until all modules are online again.


Remediation

Install update from vendor's website.

References