Improper Check for Unusual or Exceptional Conditions in Junos OS Evolved and Juniper Junos OS - CVE-2025-59960
Published: January 19, 2026
Vulnerability identifier: #VU121667
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2025-59960
CWE-ID: CWE-754
Exploitation vector: Adjecent network
Exploit availability:
No public exploit available
Vendor: Juniper Networks, Inc.
Affected software:
Junos OS Evolved
Juniper Junos OS
Junos OS Evolved
Juniper Junos OS
Detailed vulnerability description
The vulnerability allows a remote non-authenticated attacker to crash the entire system.
The vulnerability exists due to improper check for unusual or exceptional conditions error in the Juniper DHCP service (jdhcpd). A remote non-authenticated attacker can exhaust the address pools of other subnets, leading to a Denial of Service (DoS) on the downstream DHCP server.
How to mitigate CVE-2025-59960
Install updates from vendor's website.