SB2026012021 - Incorrect permission assignment for critical resource in Junos OS Evolved and Juniper Junos OS
Published: January 20, 2026
Security Bulletin ID
SB2026012021
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Incorrect permission assignment for critical resource (CVE-ID: CVE-2025-59961)
CWE-ID: CWE-732 - Incorrect Permission Assignment for Critical Resource
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to manipulate data.
The vulnerability exists due to incorrect permission assignment for critical resource error in the Juniper DHCP daemon (jdhcpd). A local user can write to the Unix socket used to manage the jdhcpd process, resulting in complete control over the resource.
Remediation
Install update from vendor's website.