Integer overflow in Juniper Networks Junos OS
CVE-2026-101968
An Integer Underflow (Wrap or Wraparound) vulnerability in the rpd process of Juniper Networks Junos OS on EX Series and MX Series, and Junos OS Evolved on ACX Series allows an unauthenticated adjacent attacker to cause heap memory disclosure and multicast join-state injection via a malformed Rosen-MVPN message. This issue only affects platforms that support draft Rosen MVPN, such as the ACX Series, EX Series, and MX Series.
Published .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N.
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)
References
- supportportal.juniper.net/JSA112187 (vendor-advisory)
Frequently asked questions
- What is CVE-2026-101968?
- CVE-2026-101968 is a medium-severity vulnerability in Juniper Networks Junos OS, classified under Integer Underflow. CVSS score: 5.4/10. Published 2026-10-14.
- How severe is CVE-2026-101968?
- Medium severity. CVSS v3 base score is 5.4 out of 10.