---
title: "CVE-2026-102056: Juniper Networks Junos OS - Out-of-bounds Read"
description: "Juniper Networks Junos OS and Junos OS Evolved contain an out-of-bounds read vulnerability caused by improper handling of specific CFM messages in the cfmd process, letting unauthenticated adjacent-network attackers crash the daemon and disclose limited process memory, exploit requires network adjacency."
url: https://panop.io/threat-heartbeat/CVE-2026-102056/
---

# CVE-2026-102056 Juniper Networks Junos OS - Out-of-bounds Read

Juniper Networks Junos OS and Junos OS Evolved contain an out-of-bounds read vulnerability caused by improper handling of specific CFM messages in the cfmd process, letting unauthenticated adjacent-network attackers crash the daemon and disclose limited process memory, exploit requires network adjacency.

CVSS base score 7.1 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-102056)

## Details

Type

Out-of-bounds Read

Impact

Denial Of Service, Information Disclosure

CVSS vector

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H

Published

14 October 2026

Updated

15 October 2026

Weakness

[CWE-125](https://cwe.mitre.org/data/definitions/125.html)

## Vendor fix

Update to the latest Junos OS and Junos OS Evolved versions with the fix applied.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-102056](https://nvd.nist.gov/vuln/detail/CVE-2026-102056)
- [https://supportportal.juniper.net/JSA112187](https://supportportal.juniper.net/JSA112187)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

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