Improper Check for Unusual or Exceptional Conditions in Junos OS - CVE-2026-33787
Published: May 8, 2026
Vulnerability identifier: #VU130700
CSH Severity: Low
CVSS v4: 6.8 [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]
CVE-ID: CVE-2026-33787
CWE-ID: CWE-754
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
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 affected command to cause a denial of service.
The daemon crash and restart causes a momentary impact to traffic until all modules are online again.
Affected software
Junos OS
How to mitigate CVE-2026-33787
Install security update from vendor's website.
Junos OS - addressed in versions 23.2R2-S6, 23.4R2-S7, 24.2R2-S2, 24.4R2, 25.2R1-S1, 25.2R2, 25.4R1