A vulnerability in the Cisco Discovery Protocol implementation for Cisco IOS XR Software could allow an unauthenticated, adjacent attacker to execute arbitrary code or cause a reload on an affected device. The vulnerability is due to improper validation of string input from certain fields in Cisco Discovery Protocol messages. An attacker could exploit this vulnerability by sending a malicious Cisco Discovery Protocol packet to an affected device. A successful exploit could allow the attacker to cause a stack overflow, which could allow the attacker to execute arbitrary code with administrative privileges on an affected device. Cisco Discovery Protocol is a Layer 2 protocol. To exploit this vulnerability, an attacker must be in the same broadcast domain as the affected device (Layer 2 adjacent).
This vulnerability carries a HIGH severity rating with a CVSS v3.1 score of 8.8, indicating it requires adjacent network access with relatively low complexity without requiring user interaction and does not require pre-existing privileges . The vulnerability impacts confidentiality (data exposure), integrity (unauthorized modifications), and availability (service disruption) for affected systems. Impacting 37 products from cisco, from cisco, from cisco and 34 others, organizations running these solutions should prioritize assessment and patching.
Reported in 2020, 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.
2020-02-05T18:15:10.907
2025-10-28T13:57:54.817
Analyzed
CVSSv3.1: 8.8 (HIGH)
AV:A/AC:L/Au:N/C:C/I:C/A:C
6.5
10.0
| Type | Vendor | Product | Version/Range | Vulnerable? |
|---|---|---|---|---|
| Operating System | cisco | ios_xr | < 6.6.12 | Yes |
| Operating System | cisco | ios_xr | < 7.0.2 | Yes |
| Operating System | cisco | ios_xr | 6.5.3 | Yes |
| Hardware | cisco | asr_9000v | - | No |
| Hardware | cisco | asr_9001 | - | No |
| Hardware | cisco | asr_9006 | - | No |
| Hardware | cisco | asr_9010 | - | No |
| Hardware | cisco | asr_9901 | - | 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 |
| Hardware | cisco | ncs_540-12z20g-sys-a | - | No |
| Hardware | cisco | ncs_540-12z20g-sys-d | - | No |
| Hardware | cisco | ncs_540-24z8q2c-sys | - | No |
| Hardware | cisco | ncs_540-28z4c-sys-a | - | No |
| Hardware | cisco | ncs_540-28z4c-sys-d | - | No |
| Hardware | cisco | ncs_540-acc-sys | - | No |
| Hardware | cisco | ncs_540x-12z16g-sys-a | - | No |
| Hardware | cisco | ncs_540x-12z16g-sys-d | - | No |
| Hardware | cisco | ncs_540x-16z4g8q2c-a | - | No |
| Hardware | cisco | ncs_540x-16z4g8q2c-d | - | No |
| Hardware | cisco | ncs_540x-acc-sys | - | No |
| Hardware | cisco | ncs_5501 | - | No |
| Hardware | cisco | ncs_5501-se | - | No |
| Hardware | cisco | ncs_5502 | - | No |
| Hardware | cisco | ncs_5502-se | - | No |
| Hardware | cisco | ncs_5508 | - | No |
| Hardware | cisco | ncs_5516 | - | No |
| Hardware | cisco | xrv_9000 | - | No |
| Operating System | cisco | ios_xr | 5.2.5 | Yes |
| Hardware | cisco | ncs_6000 | - | No |
| Hardware | cisco | ncs_6008 | - | No |
| Operating System | cisco | ios_xr | 6.4.2 | Yes |
| Hardware | cisco | asr_9000 | - | No |
| Hardware | cisco | asr_9000v | - | No |
| Hardware | cisco | asr_9001 | - | No |
| Hardware | cisco | asr_9006 | - | No |
| Hardware | cisco | asr_9010 | - | No |
| Hardware | cisco | asr_9901 | - | 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_9920 | - | No |
| Hardware | cisco | asr_9922 | - | No |
| Hardware | cisco | crs-x | - | No |
| Operating System | cisco | ios_xr | 6.6.25 | Yes |
| Hardware | cisco | ncs_560 | - | No |
| Operating System | cisco | ios_xr | 7.0.1 | Yes |
| Hardware | cisco | ncs_540l | - | 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.