What is the CVSS score of CVE-2025-59960?

CVE-2025-59960 has a CVSS 3.1 base score of 7.4 (High). CVSS vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H. EPSS exploitation probability: 0.0%.

Which versions of Junos are affected by CVE-2025-59960?

CVE-2025-59960 presents moderate security risk rated CVSS 7.4. Exploitation could compromise the security of affected deployments.

How to fix or mitigate CVE-2025-59960?

Within 7 days: Identify all affected systems and apply vendor patches promptly. Monitor vendor channels for patch availability.

Junos CVE-2025-59960

HIGH

Improper Check for Unusual or Exceptional Conditions (CWE-754)

2026-01-15 sirt@juniper.net

Juniper Denial Of Service Junos Junos Os Evolved

7.4

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

7.4 HIGH

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Attack Vector

Adjacent

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Changed

Confidentiality

None

Integrity

None

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 21:54 vuln.today

CVE Published

Jan 15, 2026 - 21:16 nvd

HIGH 7.4

DescriptionCVE.org

An Improper Check for Unusual or Exceptional Conditions vulnerability in the Juniper DHCP service (jdhcpd) of Juniper Networks Junos OS and Junos OS Evolved allows a DHCP client in one subnet to exhaust the address pools of other subnets, leading to a Denial of Service (DoS) on the downstream DHCP server.

By default, the DHCP relay agent inserts its own Option 82 information when forwarding client requests, optionally replacing any Option 82 information provided by the client. When a specific DHCP DISCOVER is received in 'forward-only' mode with Option 82, the device should drop the message unless 'trust-option82' is configured. Instead, the DHCP relay forwards these packets to the DHCP server unmodified, which uses up addresses in the DHCP server's address pool, ultimately leading to address pool exhaustion.

This issue affects Junos OS:

all versions before 21.2R3-S10,
from 21.4 before 21.4R3-S12,
all versions of 22.2,
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 21.4R3-S12-EVO,
all versions of 22.2-EVO,
from 22.4 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.

AnalysisAI

By default, the DHCP relay agent inserts its own Option 82 information when forwarding client requests, optionally replacing any Option 82 information provided by the client. When a speci...

Technical ContextAI

This vulnerability (CWE-754: Improper Check for Unusual or Exceptional Conditions) exists in the Juniper DHCP component. An Improper Check for Unusual or Exceptional Conditions vulnerability in the Juniper DHCP service (jdhcpd) of Juniper Networks Junos OS and Junos OS Evolved allows a DHCP client in one subnet to exhaust the address pools of other subnets, leading to a Denial of Service (DoS) on the downstream DHCP server.

By default, the DHCP relay agent inserts its own Option 82 information when forwarding client requests, optionally replacing any Option 82 information provided by the client. When a specific