A vulnerability in the Border Gateway Protocol (BGP) implementation of Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition due to the device unexpectedly reloading. The vulnerability is due to incomplete input validation of the BGP update messages. An attacker could exploit this vulnerability by sending a crafted BGP update message to the targeted device. An exploit could allow the attacker to cause the switch to reload unexpectedly. The Cisco implementation of the BGP protocol only accepts incoming BGP traffic from explicitly defined peers. To exploit this vulnerability, an attacker must be able to send the malicious packets over a TCP connection that appears to come from a trusted BGP peer or inject malformed messages into the victim's BGP network. This would require obtaining information about the BGP peers in the affected system's trusted network. The vulnerability may be triggered when the router receives a malformed BGP message from a peer on an existing BGP session. At least one BGP neighbor session must be established for a router to be vulnerable. This vulnerability affects Nexus 2000 Series Switches, Nexus 3000 Series Switches, Nexus 3500 Platform Switches, Nexus 3600 Platform Switches, Nexus 5500 Platform Switches, Nexus 5600 Platform Switches, Nexus 6000 Series Switches, Nexus 7000 Series Switches, Nexus 7700 Series Switches, Nexus 9000 Series Fabric Switches in Application Centric Infrastructure (ACI) mode, Nexus 9000 Series Switches in standalone NX-OS mode, Nexus 9500 R-Series Line Cards and Fabric Modules. Cisco Bug IDs: CSCve79599, CSCve87784, CSCve91371, CSCve91387.
This vulnerability carries a HIGH severity rating with a CVSS v3.1 score of 7.5, 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 65 products from cisco, from cisco, from cisco and 62 others, organizations running these solutions should prioritize assessment and patching.
First disclosed in 2018, this vulnerability was reported during a period defined by widespread IoT adoption challenges, mobile security concerns, and the emergence of advanced persistent threat (APT) techniques. Contemporary mitigation strategies focused on secure development practices and third-party component vetting.
2018-06-20T21:29:00.437
2026-06-17T01:30:25.267
Modified
CVSSv3.0: 7.5 (HIGH)
AV:N/AC:L/Au:N/C:N/I:N/A:C
10.0
6.9
| Type | Vendor | Product | Version/Range | Vulnerable? |
|---|---|---|---|---|
| Operating System | cisco | nx-os | < 7.3\(3\)n1\(1\) | Yes |
| Hardware | cisco | nexus_5000 | - | No |
| Hardware | cisco | nexus_5010 | - | No |
| Hardware | cisco | nexus_5020 | - | No |
| Hardware | cisco | nexus_5548p | - | No |
| Hardware | cisco | nexus_5548up | - | No |
| Hardware | cisco | nexus_5596t | - | No |
| Hardware | cisco | nexus_5596up | - | No |
| Hardware | cisco | nexus_56128p | - | No |
| Hardware | cisco | nexus_5624q | - | No |
| Hardware | cisco | nexus_5648q | - | No |
| Hardware | cisco | nexus_5672up | - | No |
| Hardware | cisco | nexus_5696q | - | No |
| Operating System | cisco | nx-os | < 8.1\(2\) | Yes |
| Hardware | cisco | nexus_7000 | - | No |
| Hardware | cisco | nexus_7700 | - | No |
| Operating System | cisco | nx-os | < 7.0\(3\)i3 | Yes |
| Operating System | cisco | nx-os | < 7.0\(3\)i7\(1\) | Yes |
| Hardware | cisco | nexus_92160yc-x | - | No |
| Hardware | cisco | nexus_92304qc | - | No |
| Hardware | cisco | nexus_9236c | - | No |
| Hardware | cisco | nexus_9272q | - | No |
| Hardware | cisco | nexus_93108tc-ex | - | No |
| Hardware | cisco | nexus_93120tx | - | No |
| Hardware | cisco | nexus_93128tx | - | No |
| Hardware | cisco | nexus_93180yc-ex | - | No |
| Hardware | cisco | nexus_9332pq | - | No |
| Hardware | cisco | nexus_9372px | - | No |
| Hardware | cisco | nexus_9372tx | - | No |
| Hardware | cisco | nexus_9396px | - | No |
| Hardware | cisco | nexus_9396tx | - | No |
| Hardware | cisco | nexus_9504 | - | No |
| Hardware | cisco | nexus_9508 | - | No |
| Hardware | cisco | nexus_9516 | - | No |
| Hardware | cisco | nexus_n9k-c9508-fm-r | - | No |
| Hardware | cisco | nexus_n9k-x9636c-r | - | No |
| Hardware | cisco | nexus_n9k-x9636q-r | - | No |
| Operating System | cisco | nx-os | < 7.0\(3\)i4 | Yes |
| Operating System | cisco | nx-os | < 7.0\(3\)i6\(2\) | Yes |
| Operating System | cisco | nx-os | 7.0\(3\)i7 | Yes |
| Hardware | cisco | nexus_172tq-xl | - | No |
| Hardware | cisco | nexus_3016 | - | No |
| Hardware | cisco | nexus_3048 | - | No |
| Hardware | cisco | nexus_3064-32t | - | No |
| Hardware | cisco | nexus_3064-t | - | No |
| Hardware | cisco | nexus_3064-x | - | No |
| Hardware | cisco | nexus_3100-v | - | No |
| Hardware | cisco | nexus_31128pq | - | No |
| Hardware | cisco | nexus_3132c-z | - | No |
| Hardware | cisco | nexus_3132q | - | No |
| Hardware | cisco | nexus_3132q-x | - | No |
| Hardware | cisco | nexus_3132q-xl | - | No |
| Hardware | cisco | nexus_3164q | - | No |
| Hardware | cisco | nexus_3172pq | - | No |
| Hardware | cisco | nexus_3172pq-xl | - | No |
| Hardware | cisco | nexus_3172tq | - | No |
| Hardware | cisco | nexus_3172tq-32t | - | No |
| Hardware | cisco | nexus_3232c | - | No |
| Hardware | cisco | nexus_3264c-e | - | No |
| Hardware | cisco | nexus_3264q | - | No |
| Hardware | cisco | nexus_34180yc | - | No |
| Hardware | cisco | nexus_3524-x | - | No |
| Hardware | cisco | nexus_3524-xl | - | No |
| Hardware | cisco | nexus_3548 | - | No |
| Hardware | cisco | nexus_3548-x | - | No |
| Hardware | cisco | nexus_3548-xl | - | No |
| Hardware | cisco | nexus_3636c-r | - | No |
| Hardware | cisco | nexus_c36180yc-r | - | No |
| Operating System | cisco | nx-os | < 7.3\(3\)n1\(1\) | Yes |
| Hardware | cisco | nexus_6001p | - | No |
| Hardware | cisco | nexus_6001t | - | No |
| Operating System | cisco | nx-os | 7.0 | Yes |
| Hardware | cisco | nexus_9500 | - | 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.