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.
References
| Link | Resource |
|---|---|
| https://supportportal.juniper.net/JSA100051 | Vendor Advisory |
Configurations
Configuration 1 (hide)
| AND |
|
History
23 Jan 2026, 19:36
| Type | Values Removed | Values Added |
|---|---|---|
| CPE | cpe:2.3:o:juniper:junos:21.2:r3-s8:*:*:*:*:*:* cpe:2.3:h:juniper:acx5048:-:*:*:*:*:*:*:* cpe:2.3:h:juniper:acx2200:-:*:*:*:*:*:*:* cpe:2.3:o:juniper:junos:*:*:*:*:*:*:*:* cpe:2.3:o:juniper:junos:21.2:r2-s2:*:*:*:*:*:* cpe:2.3:h:juniper:acx5096:-:*:*:*:*:*:*:* cpe:2.3:o:juniper:junos:21.2:r3-s7:*:*:*:*:*:* cpe:2.3:o:juniper:junos:21.2:r2-s1:*:*:*:*:*:* cpe:2.3:h:juniper:acx1100:-:*:*:*:*:*:*:* cpe:2.3:h:juniper:acx1000:-:*:*:*:*:*:*:* cpe:2.3:o:juniper:junos:21.2:r3:*:*:*:*:*:* cpe:2.3:o:juniper:junos:21.2:r1-s1:*:*:*:*:*:* cpe:2.3:o:juniper:junos:21.2:r3-s6:*:*:*:*:*:* cpe:2.3:o:juniper:junos:21.2:r3-s3:*:*:*:*:*:* cpe:2.3:o:juniper:junos:21.2:r3-s4:*:*:*:*:*:* cpe:2.3:o:juniper:junos:21.2:r1-s2:*:*:*:*:*:* cpe:2.3:h:juniper:acx2100:-:*:*:*:*:*:*:* cpe:2.3:o:juniper:junos:21.2:r3-s1:*:*:*:*:*:* cpe:2.3:h:juniper:acx2000:-:*:*:*:*:*:*:* cpe:2.3:o:juniper:junos:21.2:-:*:*:*:*:*:* cpe:2.3:o:juniper:junos:21.2:r3-s5:*:*:*:*:*:* cpe:2.3:o:juniper:junos:21.2:r2:*:*:*:*:*:* cpe:2.3:o:juniper:junos:21.2:r1:*:*:*:*:*:* cpe:2.3:h:juniper:acx4000:-:*:*:*:*:*:*:* cpe:2.3:o:juniper:junos:21.2:r3-s2:*:*:*:*:*:* |
|
| First Time |
Juniper
Juniper acx5048 Juniper acx1100 Juniper acx4000 Juniper acx1000 Juniper acx2000 Juniper acx2100 Juniper junos Juniper acx5096 Juniper acx2200 |
|
| References | () https://supportportal.juniper.net/JSA100051 - Vendor Advisory |
15 Jul 2025, 13:14
| Type | Values Removed | Values Added |
|---|---|---|
| Summary |
|
11 Jul 2025, 15:15
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2025-07-11 15:15
Updated : 2026-01-23 19:36
NVD link : CVE-2025-52947
Mitre link : CVE-2025-52947
CVE.ORG link : CVE-2025-52947
JSON object : View
Products Affected
juniper
- acx5048
- acx2100
- acx1000
- acx1100
- acx2000
- acx4000
- acx5096
- junos
- acx2200
CWE
CWE-755
Improper Handling of Exceptional Conditions
