cvedb.io
CVE-2021-34703
MEDIUM · CVSS 6.8
EPSS exploitation probability: 0%
Published 2021-09-23T03:15:16.970 · Last modified 2026-06-17T03:56:23.080

Summary

A vulnerability in the Link Layer Discovery Protocol (LLDP) message parser of Cisco IOS Software and Cisco IOS XE Software could allow an attacker to trigger a reload of an affected device, resulting in a denial of service (DoS) condition. This vulnerability is due to improper initialization of a buffer. An attacker could exploit this vulnerability via any of the following methods: An authenticated, remote attacker could access the LLDP neighbor table via either the CLI or SNMP while the device is in a specific state. An unauthenticated, adjacent attacker could corrupt the LLDP neighbor table by injecting specific LLDP frames into the network and then waiting for an administrator of the device or a network management system (NMS) managing the device to retrieve the LLDP neighbor table of t

Affected products

cisco — ios

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References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.