Local Priv Esc via jdhcpd Unix Socket Permission in Junos OS before 21.2R3-S10
CVE-2025-59961 Published on January 15, 2026
Junos OS and Junos OS Evolved: Unix socket used to control the jdhcpd process is world-writable
An Incorrect Permission Assignment for Critical Resource vulnerability in the Juniper DHCP daemon (jdhcpd) of Juniper Networks Junos OS and Junos OS Evolved allows a local, low-privileged user to write to the Unix socket used to manage the jdhcpd process, resulting in complete control over the resource.
This vulnerability allows any low-privileged user logged into the system to connect to the Unix socket and issue commands to manage the DHCP service, in essence, taking administrative control of the local DHCP server or DHCP relay.
This issue affects:
Junos OS:
* all versions before 21.2R3-S10,
* all versions of 22.2,
* from 21.4 before 21.4R3-S12,
* from 22.4 before 22.4R3-S8,
* from 23.2 before 23.2R2-S5,
* from 23.4 before 23.4R2-S6,
* from 24.2 before 24.2R2-S2,
* from 24.4 before 24.4R2,
* from 25.2 before 25.2R1-S1, 25.2R2;
Junos OS Evolved:
* all versions before 22.4R3-S8-EVO,
* from 23.2 before 23.2R2-S5-EVO,
* from 23.4 before 23.4R2-S6-EVO,
* from 24.2 before 24.2R2-S2-EVO,
* from 24.4 before 24.4R2-EVO,
* from 25.2 before 25.2R1-S1-EVO, 25.2R2-EVO.
Vulnerability Analysis
CVE-2025-59961 can be exploited with local system access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality, a high impact on integrity, and no impact on availability.
Weakness Type
Incorrect Permission Assignment for Critical Resource
The product specifies permissions for a security-critical resource in a way that allows that resource to be read or modified by unintended actors. When a resource is given a permissions setting that provides access to a wider range of actors than required, it could lead to the exposure of sensitive information, or the modification of that resource by unintended parties. This is especially dangerous when the resource is related to program configuration, execution or sensitive user data.
Products Associated with CVE-2025-59961
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Affected Versions
Juniper Networks Junos OS:- Before 21.2R3-S10 is affected.
- Version 21.4 and below 21.4R3-S12 is affected.
- Version 22.2 and below 22.2* is affected.
- Version 22.4 and below 22.4R3-S8 is affected.
- Version 23.2 and below 23.2R2-S5 is affected.
- Version 23.4 and below 23.4R2-S6 is affected.
- Version 24.2 and below 24.2R2-S2 is affected.
- Version 24.4 and below 24.4R2 is affected.
- Version 25.2 and below 25.2R1-S1, 25.2R2 is affected.
- Before 22.4R3-S8-EVO is affected.
- Version 23.2 and below 23.2R2-S5-EVO is affected.
- Version 23.4 and below 23.4R2-S6-EVO is affected.
- Version 24.2 and below 24.2R2-S2-EVO is affected.
- Version 24.4 and below 24.4R2-EVO is affected.
- Version 25.2 and below 25.2R1-S1-EVO, 25.2R2-EVO is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.