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MEDIUM · 5.5

CVE-2026-57025

A Return of Pointer Value Outside of Expected Range vulnerability in the fileio library of Juniper Networks Junos OS and Junos OS Evolved allows a local, low-privilged attacker to cause a Denial-of-Se...

Vulnerability Description

A Return of Pointer Value Outside of Expected Range vulnerability in the fileio library of Juniper Networks Junos OS and Junos OS Evolved allows a local, low-privilged attacker to cause a Denial-of-Service (DoS). On EX Series, QFX Series and MX Series a low-privileged attacker issuing a specific 'show l2-learning' or 'show ethernet-switching' command will cause an l2ald crash which will lead to a temporary service impact for all layer 2 services until the process has automatically restarted. This issue affects EX Series, QFX Series, MX Series: Junos OS: * all versions before 23.2R2-S7, * 23.4 versions before 23.4R2-S7, * 24.2 versions before 24.2R2, * 24.4 versions before 24.4R1-S2. Junos OS Evolved: * all versions before 23.2R2-S7-EVO, * 23.4 versions before 23.4R2-S8-EVO, * 24.2 versions before 24.2R2-EVO, * 24.4 versions before 24.4R1-S3-EVO.

CVSS Score

5.5

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH

Affected Products

VendorProductVersions
JuniperJunos< 23.2
JuniperEx2300-
JuniperEx2300-C-
JuniperEx3400-
JuniperEx4000-
JuniperEx4100-
JuniperEx4100-F-
JuniperEx4100-H-
JuniperEx4100-H-12T-
JuniperEx4300-
JuniperEx4400-
JuniperEx4600-
JuniperEx4650-
JuniperEx9204-
JuniperEx9208-
JuniperEx9214-
JuniperMx10004-
JuniperMx10008-
JuniperMx2008-
JuniperMx2010-

Related Weaknesses (CWE)

CWE-466

References

FAQ

What is CVE-2026-57025?

CVE-2026-57025 is a vulnerability with a CVSS score of 5.5 (MEDIUM). A Return of Pointer Value Outside of Expected Range vulnerability in the fileio library of Juniper Networks Junos OS and Junos OS Evolved allows a local, low-privilged attacker to cause a Denial-of-Se...

How severe is CVE-2026-57025?

CVE-2026-57025 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-57025?

Check the references section above for vendor advisories and patch information. Affected products include: Juniper Junos, Juniper Ex2300, Juniper Ex2300-C, Juniper Ex3400, Juniper Ex4000.