What is CVE-2025-59958?

CVE-2025-59958 is a medium-severity vulnerability in Juniper Junos_os_evolved, classified under Improper Check for Unusual or Exceptional Conditions. CVSS score: 6.5/10. Published 2025-10-09.

How severe is CVE-2025-59958?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Juniper Junos_os_evolved

CVE-2025-59958

An Improper Check for Unusual or Exceptional Conditions vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS Evolved on PTX Series allows an unauthenticated, network-based attacker to cause impact to confidentia…

EPSS: 0.003 (16.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L.

Affected products

Juniper Junos_os_evolved — versions 22.4, 23.2
Juniper Ptx1000
Juniper Ptx10001-36mr
Juniper Ptx10002
Juniper Ptx10003
Juniper Ptx10004
Juniper Ptx10008
Juniper Ptx10016
Juniper Ptx3000
Juniper Ptx5000

Weakness classification (CWE)

CWE-754 — Improper Check for Unusual or Exceptional Conditions

References

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

Frequently asked questions

What is CVE-2025-59958?: CVE-2025-59958 is a medium-severity vulnerability in Juniper Junos_os_evolved, classified under Improper Check for Unusual or Exceptional Conditions. CVSS score: 6.5/10. Published 2025-10-09.
How severe is CVE-2025-59958?: Medium severity. CVSS v3 base score is 6.5 out of 10.