---
id: CVE-2026-101965
title: >-
  An Use of Externally-Controlled Format String vulnerability in the gRPC daemon
  of Juniper Networks Junos OS Evolved allows an authenticated network attacker
  to cause telemetry-service disruption, information disclosure, or potential
  root…
summary: >-
  An Use of Externally-Controlled Format String vulnerability in the gRPC daemon
  of Juniper Networks Junos OS Evolved allows an authenticated network attacker
  to cause telemetry-service disruption, information disclosure, or potential
  root…
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-134
vendor: Juniper Networks
product: Junos OS Evolved
affected:
  - 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: '2026-10-15'
sourceUpdated: '2026-10-15T16:24:19.073'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-101965'
references:
  - url: 'https://supportportal.juniper.net/JSA112250'
    label: sirt@juniper.net
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-14T20:35:45.865284Z'
ingestedAt: '2026-10-14T17:44:53.633Z'
epss: 0.00601
epssPercentile: 0.4856
---

## Overview

An Use of Externally-Controlled Format String vulnerability in the gRPC daemon of Juniper Networks Junos OS Evolved allows an authenticated network attacker to cause telemetry-service disruption, information disclosure, or potential root-level code execution via a crafted message to the gNMI service.

## Remediation

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