---
id: CVE-2026-101968
title: >-
  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
  discl…
summary: >-
  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
  discl…
severity: medium
cvss: 5.4
cvssVector: 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N'
cwe:
  - CWE-191
vendor: Juniper Networks
product: Junos OS
affected:
  - junos_os < 23.2R2-S7.7
  - junos_os >= 23.4 < 23.4R2-S8.13
  - junos_os >= 24.2 < 24.2R2-S5.5
  - junos_os >= 24.4 < 24.4R2-S5
  - junos_os >= 25.2 < 25.2R2-S2
  - junos_os >= 25.4 < 25.4R1-S3
  - junos_os >= 26.2 < 26.2R1-S2
  - junos_os_evolved < 23.2R2-S7.7-EVO
  - junos_os_evolved >= 23.4 < 23.4R2-S8.11-EVO
  - junos_os_evolved >= 24.2 < 24.2R2-S5.6-EVO
  - junos_os_evolved >= 24.4 < 24.4R2-S5-EVO
  - junos_os_evolved >= 25.2 < 25.2R2-S2-EVO
  - junos_os_evolved >= 25.4 < 25.4R1-S3-EVO
  - junos_os_evolved >= 26.2 < 26.2R1-S2-EVO
  - junos_os_evolved 23.4X100
  - junos_os_evolved >= 25.2X100 < 25.2X100-D35-EVO
  - junos_os_evolved >= 25.4X300 < 25.4X300-D40-EVO
published: '2026-10-14'
updated: '2026-10-16'
sourceUpdated: '2026-10-16T16:16:50.070'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-101968'
references:
  - url: 'https://supportportal.juniper.net/JSA112187'
    label: sirt@juniper.net
tags:
  - nvd
  - cve.org
epss: 0.00245
epssPercentile: 0.15692
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-16T15:22:38.990883Z'
ingestedAt: '2026-10-14T17:44:53.634Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.