CVE-2026-33786

EUVD-2026-21092
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
5.5 MEDIUM
LOCAL
LOW
LOW
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 4%
Affected Products (NVD)
VendorProductVersion
juniperjunos
24.4
juniperjunos
24.4:r1
juniperjunos
24.4:r1-s2
juniperjunos
24.4:r2
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://kb.juniper.net/JSA107810