CVE-2026-57025

Layer 2 service interruption via pointer-range error

Published Jul 9, 2026 · Updated Jul 9, 2026

Pointer-range error in Juniper Networks Junos OS and Junos OS Evolved allows local users to crash l2ald via an operational CLI command. The fileio library returns a pointer outside its expected range while l2ald handles specific show l2-learning or show ethernet-switching requests. Low-privileged CLI access on affected EX, QFX, or MX devices is required; the crash temporarily interrupts all Layer 2 services until l2ald automatically restarts.

CVSS severity5.5
Medium
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Pointer-range error in Juniper Networks Junos OS and Junos OS Evolved allows local users to crash l2ald via an operational CLI command. The fileio library returns a pointer outside its expected range while l2ald handles specific show l2-learning or show ethernet-switching requests. Low-privileged CLI access on affected EX, QFX, or MX devices is required; the crash temporarily interrupts all Layer 2 services until l2ald automatically restarts.

The record

CVE
CVE-2026-57025
Published
Jul 9, 2026
Updated
Jul 9, 2026
Vendor
Juniper Networks
Product
Junos OS Evolved
Classifications
CWE-466, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 9, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 9, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <23.2R2-S7-EVO
  2. Affected versionversion=23.4 <23.4R2-S8-EVO
  3. Affected versionversion=24.2 <24.2R2-EVO
  4. Affected versionversion=24.4 <24.4R1-S3-EVO

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Juniper Networks · Junos OS Evolvedversion=0 <23.2R2-S7-EVO; version=23.4 <23.4R2-S8-EVO; version=24.2 <24.2R2-EVO; version=24.4 <24.4R1-S3-EVO
Juniper Networks · Junos OSversion=0 <23.2R2-S7; version=23.4 <23.4R2-S7; version=24.2 <24.2R2; version=24.4 <24.4R1-S2

Published CVSS scores

6.8Juniper NetworksCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L
5.5Juniper NetworksCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-466Return of Pointer Value Outside of Expected Range
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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