PT-2026-31805 · Juniper Networks · Junos

Published 2026-04-09 · Updated 2026-04-09 · CVE-2026-33787

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Juniper Networks Junos OS versions prior to 23.2R2-S6, versions prior to 23.4R2-S7, versions prior to 24.2R2-S2, versions prior to 24.4R2, and versions prior to 25.2R1-S1, 25.2R2.

Description An improper check for unusual or exceptional conditions exists in the chassis control daemon (chassisd). A local attacker with low privileges can cause a Denial of Service (DoS). Executing a specific 'show chassis' command causes chassisd to crash and restart, momentarily impacting all traffic until modules are back online.

Recommendations Update to Junos OS version 23.2R2-S6 or later. Update to Junos OS version 23.4R2-S7 or later. Update to Junos OS version 24.2R2-S2 or later. Update to Junos OS version 24.4R2 or later. Update to Junos OS version 25.2R1-S1 or 25.2R2 or later.

Fix

Improper Check for Exceptional Conditions

Weakness Enumeration

CWE-754

Related Identifiers

CVE-2026-33787

Affected Products

Junos

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-33787 · Security Note
• https://kb.juniper.net/JSA107873 · Vendor Advisory
• https://twitter.com/CVEnew/status/2042364287553831420 · Twitter Post