CVE-2026-33787

EUVD-2026-21205
An Improper Check for Unusual or Exceptional Conditions vulnerability in the chassis control daemon (chassisd) of Juniper Networks Junos OS on SRX1500, SRX4100, SRX4200 and SRX4600 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 SRX1500, SRX4100, SRX4200 and SRX4600: 



  *  23.2 versions before 23.2R2-S6,
  *  23.4 versions before 23.4R2-S7
  *  24.2 versions before 24.2R2-S2,
  *  24.4 versions before 24.4R2,
  *  25.2 versions before 25.2R1-S1, 25.2R2.
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
23.2
juniperjunos
23.2:r1
juniperjunos
23.2:r1-s1
juniperjunos
23.2:r1-s2
juniperjunos
23.2:r2
juniperjunos
23.2:r2-s1
juniperjunos
23.2:r2-s2
juniperjunos
23.2:r2-s3
juniperjunos
23.2:r2-s4
juniperjunos
23.2:r2-s5
juniperjunos
23.4
juniperjunos
23.4:r1
juniperjunos
23.4:r1-s1
juniperjunos
23.4:r1-s2
juniperjunos
23.4:r2
juniperjunos
23.4:r2-s1
juniperjunos
23.4:r2-s2
juniperjunos
23.4:r2-s3
juniperjunos
23.4:r2-s4
juniperjunos
23.4:r2-s5
juniperjunos
23.4:r2-s6
juniperjunos
24.2
juniperjunos
24.2:r1
juniperjunos
24.2:r1-s1
juniperjunos
24.2:r1-s2
juniperjunos
24.2:r2
juniperjunos
24.2:r2-s1
juniperjunos
24.4
juniperjunos
24.4:r1
juniperjunos
24.4:r1-s2
juniperjunos
24.4:r1-s3
juniperjunos
25.2
juniperjunos
25.2:r1
juniperjunos
25.2:r2
𝑥
= Vulnerable software versions