# CVE-2026-33786: An Improper Check for Unusual or Exceptional Conditions vulnerability in the chassis control daemon (chassisd) of…

Source: https://junglewise.ai/threats/cve-2026-33786-an-improper-check-for-unusual-or-exceptional-conditions  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-04-09  
License: CC BY 4.0 with a link back

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.

Technologies: [Juniper Junos](https://junglewise.ai/threats/technologies/junos). Vendors: [Juniper](https://junglewise.ai/threats/vendors/juniper).

## Quick answers

**Is CVE-2026-33786 exploited in the wild?** 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.

## Affected products

- Juniper Junos
- Juniper Srx1600
- Juniper Srx2300
- Juniper Srx4300

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