---
title: "CVE-2026-101994: Juniper Networks Junos OS - Information Disclosure & Denial of Service"
description: "Juniper Networks Junos OS and Junos OS Evolved contain an improper handling of length parameter inconsistency vulnerability in the l2ald daemon, letting attackers controlling or impersonating MC-LAG ICCP peers disclose heap memory or cause denial of service, exploit requires attacker to control or impersonate MC-LAG ICCP peer."
url: https://panop.io/threat-heartbeat/CVE-2026-101994/
---

# CVE-2026-101994 Juniper Networks Junos OS - Information Disclosure & Denial of Service

Juniper Networks Junos OS and Junos OS Evolved contain an improper handling of length parameter inconsistency vulnerability in the l2ald daemon, letting attackers controlling or impersonating MC-LAG ICCP peers disclose heap memory or cause denial of service, exploit requires attacker to control or impersonate MC-LAG ICCP peer.

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-2026-101994)

## Details

Type

Information Disclosure

Impact

Information Disclosure, Denial Of Service

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-130](https://cwe.mitre.org/data/definitions/130.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-2026-101994](https://nvd.nist.gov/vuln/detail/CVE-2026-101994)
- [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

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