What is CVE-2025-59959?

CVE-2025-59959 is a medium-severity vulnerability in Juniper Junos, classified under Untrusted Pointer Dereference. CVSS score: 5.5/10. Published 2026-01-15.

How severe is CVE-2025-59959?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Vulnerability in Juniper Junos

CVE-2025-59959

An Untrusted Pointer Dereference vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows a local, authenticated attacker with low privileges to cause a Denial-of-Service (DoS). When the…

EPSS: 0.001 (2.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Affected products

Juniper Junos — versions 22.4, 23.2, 23.4
Juniper Junos_os_evolved — versions 22.4, 23.2, 23.4
Juniper Networks Junos Os — versions 0, 23.2, 23.4
Juniper Networks Junos Os Evolved — versions 0, 23.2, 23.4

Weakness classification (CWE)

CWE-822 — Untrusted Pointer Dereference

References

sirt@juniper.net (Permissions Required, vendor-advisory)
sirt@juniper.net (vendor-advisory, Vendor Advisory)

Frequently asked questions

What is CVE-2025-59959?: CVE-2025-59959 is a medium-severity vulnerability in Juniper Junos, classified under Untrusted Pointer Dereference. CVSS score: 5.5/10. Published 2026-01-15.
How severe is CVE-2025-59959?: Medium severity. CVSS v3 base score is 5.5 out of 10.