A vulnerability in the IPv4 access control list (ACL) feature and quality of service (QoS) policy feature of Cisco IOS XR Software for Cisco ASR 9000 Series Aggregation Services Routers, ASR 9902 Compact High-Performance Routers, and ASR 9903 Compact High-Performance Routers could allow an unauthenticated, remote attacker to cause a line card to reset, resulting in a denial of service (DoS) condition. This vulnerability is due to the incorrect handling of malformed IPv4 packets that are received on line cards where the interface has either an IPv4 ACL or QoS policy applied. An attacker could exploit this vulnerability by sending crafted IPv4 packets through an affected device. A successful exploit could allow the attacker to cause network processor errors, resulting in a reset or shutdown of the network process. Traffic over that line card would be lost while the line card reloads. Note: This vulnerability has predominantly been observed in Layer 2 VPN (L2VPN) environments where an IPv4 ACL or QoS policy has been applied to the bridge virtual interface. Layer 3 configurations where the interface has either an IPv4 ACL or QoS policy applied are also affected, though the vulnerability has not been observed.
This vulnerability carries a HIGH severity rating with a CVSS v3.1 score of 8.6, 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 availability (service disruption) for affected systems. Impacting 11 products from cisco, from cisco, from cisco and 8 others, organizations running these solutions should prioritize assessment and patching.
Reported in 2025, 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.
2025-03-12T16:15:21.573
2026-06-17T08:40:46.090
Analyzed
CVSSv3.1: 8.6 (HIGH)
| Type | Vendor | Product | Version/Range | Vulnerable? |
|---|---|---|---|---|
| Operating System | cisco | ios_xr | 6.7.2 | Yes |
| Operating System | cisco | ios_xr | 6.7.3 | Yes |
| Operating System | cisco | ios_xr | 6.7.35 | Yes |
| Operating System | cisco | ios_xr | 6.8.1 | Yes |
| Operating System | cisco | ios_xr | 6.8.2 | Yes |
| Operating System | cisco | ios_xr | 6.9.1 | Yes |
| Operating System | cisco | ios_xr | 6.9.2 | Yes |
| Operating System | cisco | ios_xr | 7.1.2 | Yes |
| Operating System | cisco | ios_xr | 7.1.3 | Yes |
| Operating System | cisco | ios_xr | 7.1.15 | Yes |
| Operating System | cisco | ios_xr | 7.1.25 | Yes |
| Operating System | cisco | ios_xr | 7.3.1 | Yes |
| Operating System | cisco | ios_xr | 7.3.2 | Yes |
| Operating System | cisco | ios_xr | 7.3.3 | Yes |
| Operating System | cisco | ios_xr | 7.3.4 | Yes |
| Operating System | cisco | ios_xr | 7.3.5 | Yes |
| Operating System | cisco | ios_xr | 7.4.1 | Yes |
| Operating System | cisco | ios_xr | 7.4.2 | Yes |
| Operating System | cisco | ios_xr | 7.5.1 | Yes |
| Operating System | cisco | ios_xr | 7.5.2 | Yes |
| Operating System | cisco | ios_xr | 7.5.3 | Yes |
| Operating System | cisco | ios_xr | 7.5.4 | Yes |
| Operating System | cisco | ios_xr | 7.5.5 | Yes |
| Operating System | cisco | ios_xr | 7.6.1 | Yes |
| Operating System | cisco | ios_xr | 7.6.2 | Yes |
| Operating System | cisco | ios_xr | 7.7.1 | Yes |
| Operating System | cisco | ios_xr | 7.7.2 | Yes |
| Operating System | cisco | ios_xr | 7.8.1 | Yes |
| Operating System | cisco | ios_xr | 7.8.2 | Yes |
| Operating System | cisco | ios_xr | 7.8.22 | Yes |
| Operating System | cisco | ios_xr | 7.8.23 | Yes |
| Operating System | cisco | ios_xr | 7.9.1 | Yes |
| Operating System | cisco | ios_xr | 7.9.2 | Yes |
| Operating System | cisco | ios_xr | 7.10.1 | Yes |
| Hardware | cisco | asr_9006 | - | No |
| Hardware | cisco | asr_9010 | - | No |
| Hardware | cisco | asr_9901 | - | No |
| Hardware | cisco | asr_9902 | - | No |
| Hardware | cisco | asr_9903 | - | No |
| Hardware | cisco | asr_9904 | - | No |
| Hardware | cisco | asr_9906 | - | No |
| Hardware | cisco | asr_9910 | - | No |
| Hardware | cisco | asr_9912 | - | No |
| Hardware | cisco | asr_9922 | - | 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 cisco'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.