CVE-2026-33786: An Improper Check for Unusual or Exceptional Conditions vulnerability in the chassis control daemon (chassisd) of…
CVE-2026-33786 · Severity: medium · CVSS 5.5 · Published 2026-04-09
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.
No. Junglewise Threat Intelligence has no report of CVE-2026-33786 being exploited in the wild.
How severe is CVE-2026-33786?
Medium severity, with a CVSS score of 5.5, published 9 April 2026.
Which products and versions are affected?
Juniper Junos, Juniper Srx1600, Juniper Srx2300, Juniper Srx4300. The advisory does not name versions.
Is there a fix for CVE-2026-33786?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
Am I affected by CVE-2026-33786?
Check whether you run Juniper Junos, Juniper Srx1600, Juniper Srx2300 or one of the others listed. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.