CVE-2025-52947 Information

Jul 12, 2025 cve

Description

An Improper Handling of Exceptional Conditions vulnerability in route processing of Juniper Networks Junos OS on specific end-of-life (EOL) ACX Series platforms allows an attacker to crash the Forwarding Engine Board (FEB) by flapping an interface leading to a Denial of Service (DoS).

On ACX1000 ACX1100 ACX2000 ACX2100 ACX2200 ACX4000 ACX5048 and ACX5096 devices FEB0 will crash when the primary path port of the L2 circuit IGP (Interior Gateway Protocol) on the local device goes down. This issue is seen only when ‘hot-standby’ mode is configured for the L2 circuit.

This issue affects Junos OS on ACX1000 ACX1100 ACX2000 ACX2100 ACX2200 ACX4000 ACX5048 and ACX5096: 

all versions before 21.2R3-S9.

CVSS Vector

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

Reference

https://supportportal.juniper.net/JSA100051

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

6.5

CNNVD-202507-1652 (Published: 2025-07-11)

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