What is CVE-2026-101938?

CVE-2026-101938 is a medium-severity vulnerability in Juniper Networks Junos OS, classified under Integer Underflow. CVSS score: 6.5/10. Published 2026-10-14.

How severe is CVE-2026-101938?

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

Integer overflow in Juniper Networks Junos OS

CVE-2026-101938

An Integer Underflow (Wrap or Wraparound) vulnerability in the srxpfe of Juniper Networks Junos OS and Junos OS Evolved on the SRX Series allows an adjacent unauthenticated attacker to cause a forwarding-plane denial of service via an ICMP message associated with an SVR carrier session.

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-191 — Integer Underflow

References

supportportal.juniper.net/JSA112186 (vendor-advisory)

Frequently asked questions

What is CVE-2026-101938?: CVE-2026-101938 is a medium-severity vulnerability in Juniper Networks Junos OS, classified under Integer Underflow. CVSS score: 6.5/10. Published 2026-10-14.
How severe is CVE-2026-101938?: Medium severity. CVSS v3 base score is 6.5 out of 10.