An Improper Handling of Exceptional Conditions vulnerability in the Packet Forwarding Engine (pfe) of the Juniper Networks Junos OS Evolved on ACX Series devices allows an unauthenticated, network based attacker sending specific transit protocol traffic to cause a partial Denial of Service (DoS) to downstream devices. Receipt of specific transit protocol packets is incorrectly processed by the Routing Engine (RE), filling up the DDoS protection queue which is shared between routing protocols. This influx of transit protocol packets causes DDoS protection violations, resulting in protocol flaps which can affect connectivity to networking devices. This issue affects both IPv4 and IPv6. This issue does not require any specific routing protocol to be configured or enabled. The following commands can be used to monitor the DDoS protection queue: labuser@re0> show evo-pfemand host pkt-stats labuser@re0> show host-path ddos all-policers This issue affects Junos OS Evolved: * All versions before 21.4R3-S8-EVO, * from 22.2 before 22.2R3-S4-EVO, * from 22.3 before 22.3R3-S4-EVO, * from 22.4 before 22.4R3-S3-EVO, * from 23.2 before 23.2R2-EVO, * from 23.4 before 23.4R1-S1-EVO, 23.4R2-EVO, * from 24.2 before 24.2R2-EVO.
This vulnerability carries a MEDIUM severity rating with a CVSS v3.1 score of 5.8, indicating it can be exploited remotely over the network with relatively low complexity without requiring user interaction and does not require pre-existing privileges . The vulnerability impacts and limited availability for affected systems. Impacting 11 products from juniper, from juniper, from juniper and 8 others, organizations running these solutions should prioritize assessment and patching.
Reported in 2024, this vulnerability emerged during an era marked by increased sophistication in supply chain attacks, cloud infrastructure vulnerabilities, and software-as-a-service (SaaS) security challenges. Security practices during this period emphasized zero-trust architectures, container security, and API protection.
2024-10-11T16:15:08.533
2026-01-26T18:19:37.640
Analyzed
CVSSv3.1: 5.8 (MEDIUM)
| Type | Vendor | Product | Version/Range | Vulnerable? |
|---|---|---|---|---|
| Operating System | juniper | junos_os_evolved | < 21.4 | Yes |
| Operating System | juniper | junos_os_evolved | 21.4 | Yes |
| Operating System | juniper | junos_os_evolved | 21.4 | Yes |
| Operating System | juniper | junos_os_evolved | 21.4 | Yes |
| Operating System | juniper | junos_os_evolved | 21.4 | Yes |
| Operating System | juniper | junos_os_evolved | 21.4 | Yes |
| Operating System | juniper | junos_os_evolved | 21.4 | Yes |
| Operating System | juniper | junos_os_evolved | 21.4 | Yes |
| Operating System | juniper | junos_os_evolved | 21.4 | Yes |
| Operating System | juniper | junos_os_evolved | 21.4 | Yes |
| Operating System | juniper | junos_os_evolved | 21.4 | Yes |
| Operating System | juniper | junos_os_evolved | 21.4 | Yes |
| Operating System | juniper | junos_os_evolved | 21.4 | Yes |
| Operating System | juniper | junos_os_evolved | 21.4 | Yes |
| Operating System | juniper | junos_os_evolved | 21.4 | Yes |
| Operating System | juniper | junos_os_evolved | 21.4 | Yes |
| Operating System | juniper | junos_os_evolved | 22.2 | Yes |
| Operating System | juniper | junos_os_evolved | 22.2 | Yes |
| Operating System | juniper | junos_os_evolved | 22.2 | Yes |
| Operating System | juniper | junos_os_evolved | 22.2 | Yes |
| Operating System | juniper | junos_os_evolved | 22.2 | Yes |
| Operating System | juniper | junos_os_evolved | 22.2 | Yes |
| Operating System | juniper | junos_os_evolved | 22.2 | Yes |
| Operating System | juniper | junos_os_evolved | 22.2 | Yes |
| Operating System | juniper | junos_os_evolved | 22.2 | Yes |
| Operating System | juniper | junos_os_evolved | 22.2 | Yes |
| Operating System | juniper | junos_os_evolved | 22.2 | Yes |
| Operating System | juniper | junos_os_evolved | 22.3 | Yes |
| Operating System | juniper | junos_os_evolved | 22.3 | Yes |
| Operating System | juniper | junos_os_evolved | 22.3 | Yes |
| Operating System | juniper | junos_os_evolved | 22.3 | Yes |
| Operating System | juniper | junos_os_evolved | 22.3 | Yes |
| Operating System | juniper | junos_os_evolved | 22.3 | Yes |
| Operating System | juniper | junos_os_evolved | 22.3 | Yes |
| Operating System | juniper | junos_os_evolved | 22.3 | Yes |
| Operating System | juniper | junos_os_evolved | 22.3 | Yes |
| Operating System | juniper | junos_os_evolved | 22.3 | Yes |
| Operating System | juniper | junos_os_evolved | 22.3 | Yes |
| Operating System | juniper | junos_os_evolved | 22.4 | Yes |
| Operating System | juniper | junos_os_evolved | 22.4 | Yes |
| Operating System | juniper | junos_os_evolved | 22.4 | Yes |
| Operating System | juniper | junos_os_evolved | 22.4 | Yes |
| Operating System | juniper | junos_os_evolved | 22.4 | Yes |
| Operating System | juniper | junos_os_evolved | 22.4 | Yes |
| Operating System | juniper | junos_os_evolved | 22.4 | Yes |
| Operating System | juniper | junos_os_evolved | 22.4 | Yes |
| Operating System | juniper | junos_os_evolved | 22.4 | Yes |
| Operating System | juniper | junos_os_evolved | 22.4 | Yes |
| Operating System | juniper | junos_os_evolved | 23.2 | Yes |
| Operating System | juniper | junos_os_evolved | 23.2 | Yes |
| Operating System | juniper | junos_os_evolved | 23.2 | Yes |
| Operating System | juniper | junos_os_evolved | 23.2 | Yes |
| Operating System | juniper | junos_os_evolved | 23.4 | Yes |
| Operating System | juniper | junos_os_evolved | 23.4 | Yes |
| Operating System | juniper | junos_os_evolved | 23.4 | Yes |
| Operating System | juniper | junos_os_evolved | 24.2 | Yes |
| Operating System | juniper | junos_os_evolved | 24.2 | Yes |
| Operating System | juniper | junos_os_evolved | 24.2 | Yes |
| Hardware | juniper | acx5448 | - | No |
| Hardware | juniper | acx5448-d | - | No |
| Hardware | juniper | acx5448-m | - | No |
| Hardware | juniper | acx7020 | - | No |
| Hardware | juniper | acx7024 | - | No |
| Hardware | juniper | acx7024x | - | No |
| Hardware | juniper | acx710 | - | No |
| Hardware | juniper | acx7100 | - | No |
| Hardware | juniper | acx7300 | - | No |
| Hardware | juniper | acx7509 | - | No |
SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For juniper's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.