What is CVE-2026-101959?

CVE-2026-101959 is a medium-severity vulnerability in Juniper Networks Junos OS, classified under CWE-688. CVSS score: 6.5/10. Published 2026-10-14.

How severe is CVE-2026-101959?

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

Vulnerability in Juniper Networks Junos OS

CVE-2026-101959

A Function Call With Incorrect Variable or Reference as Argument vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated adjacent attacker to cause an rpd crash via specifically malformed LSP-ping.

Published 2026-10-14 · last modified 2026-10-14.

CVSS v3 metric

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

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Juniper Networks Junos OS
Juniper Networks Junos OS Evolved — versions 23.4X100

Weakness classification (CWE)

CWE-688

References

supportportal.juniper.net/JSA112187 (vendor-advisory)

Frequently asked questions

What is CVE-2026-101959?: CVE-2026-101959 is a medium-severity vulnerability in Juniper Networks Junos OS, classified under CWE-688. CVSS score: 6.5/10. Published 2026-10-14.
How severe is CVE-2026-101959?: Medium severity. CVSS v3 base score is 6.5 out of 10.