CVE-2026-33786

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.

CVSS v3 5.5 MEDIUM

5.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://kb.juniper.net/JSA107810	Mitigation Vendor Advisory

Configurations

Configuration 1 (hide)

AND

OR	cpe:2.3:o:juniper:junos:24.4:-::::::
	cpe:2.3:o:juniper:junos:24.4:r1::::::
	cpe:2.3:o:juniper:junos:24.4:r1-s2::::::
	cpe:2.3:o:juniper:junos:24.4:r2::::::

OR	cpe:2.3:h:juniper:srx1600:-:::::::*
	cpe:2.3:h:juniper:srx2300:-:::::::*
	cpe:2.3:h:juniper:srx4300:-:::::::*

History

26 Oct 2026, 00:10

Type	Values Removed	Values Added
Summary		(es) Una vulnerabilidad de comprobación incorrecta de condiciones inusuales o excepcionales en el demonio de control del chasis (chassisd) de Juniper Networks Junos OS en SRX1600, SRX2300 y SRX4300 permite a un atacante local con bajos privilegios causar una denegación de servicio (DoS) completa. Cuando se ejecuta un comando CLI específico ’show chassis’, chassisd falla y se reinicia, lo que causa un impacto momentáneo en todo el tráfico hasta que todos los módulos vuelvan a estar en línea. Este problema afecta a Junos OS en SRX1600, SRX2300 y SRX4300: * versiones 24.4 anteriores a 24.4R1-S3, 24.4R2. Este problema no afecta a las versiones de Junos OS anteriores a 24.4R1.

Information

Published : 2026-04-09 22:16

Updated : 2026-10-26 00:10

NVD link : CVE-2026-33786

Mitre link : CVE-2026-33786

CVE.ORG link : CVE-2026-33786

JSON object : View

Products Affected

juniper

srx4300
junos
srx2300
srx1600

CWE

CWE-754

Improper Check for Unusual or Exceptional Conditions

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completa.\n\nCuando se ejecuta un comando CLI espec\u00edfico \u2019show chassis\u2019, chassisd falla y se reinicia, lo que causa un impacto moment\u00e1neo en todo el tr\u00e1fico hasta que todos los m\u00f3dulos vuelvan a estar en l\u00ednea.\n\nEste problema afecta a Junos OS en SRX1600, SRX2300 y SRX4300:\n\n* versiones 24.4 anteriores a 24.4R1-S3, 24.4R2.\n\nEste problema no afecta a las versiones de Junos OS anteriores a 24.4R1."}], "lastModified": "2026-10-26T00:10:00.150", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:juniper:junos:24.4:-:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "C452BDCB-34E3-42D3-8909-2312356EB70A"}, {"criteria": "cpe:2.3:o:juniper:junos:24.4:r1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "2B8158F2-2028-40E9-955F-CFD581A32F60"}, {"criteria": "cpe:2.3:o:juniper:junos:24.4:r1-s2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "1A7233A1-EC7A-4458-9AE1-835480A03A21"}, {"criteria": 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