Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2026-33787

Severity CVSS v4.0:
MEDIUM
Type:
Unavailable / Other
Publication date:
09/04/2026
Last modified:
09/04/2026

Description

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).<br /> <br /> When a specific &amp;#39;show chassis&amp;#39; CLI command is executed, chassisd crashes and restarts which causes a momentary impact to all traffic until all modules are online again.<br /> <br /> <br /> <br /> This issue affects Junos OS on SRX1500, SRX4100, SRX4200 and SRX4600: <br /> <br /> <br /> <br /> * 23.2 versions before 23.2R2-S6,<br /> * 23.4 versions before 23.4R2-S7<br /> * 24.2 versions before 24.2R2-S2,<br /> * 24.4 versions before 24.4R2,<br /> * 25.2 versions before 25.2R1-S1, 25.2R2.

Impact

Vector 4.0
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/AU:Y/RE:M CVSS v4.0 Severity and Metrics:

Base Score: 6.80 MEDIUM
Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/AU:Y/RE:M

Attack Vector (AV): Local
Attack Complexity (AC): Low
Attack Requirements (AT): None
Privileges Required (PR): Low
User Interaction (UI): None
Confidentiality (VC): None
Integrity (VI): None
Availability (VA): High
Confidentiality (SC): None
Integrity (SI): None
Availability (SA): Low
Automatable (AU): Yes
Vulnerability Response Effort (RE): Moderate

Base Score 4.0
6.80
Severity 4.0
MEDIUM
Vector 3.x
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 5.50 MEDIUM
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x
5.50
Severity 3.x
MEDIUM

References to Advisories, Solutions, and Tools