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VULNERABILITIES

CVE-2021-34780 Details

Description

Multiple vulnerabilities exist in the Link Layer Discovery Protocol (LLDP) implementation for Cisco Small Business 220 Series Smart Switches. An unauthenticated, adjacent attacker could perform the following: Execute code on the affected device or cause it to reload unexpectedly Cause LLDP database corruption on the affected device For more information about these vulnerabilities, see the Details section of this advisory. Note: LLDP is a Layer 2 protocol. To exploit these vulnerabilities, an attacker must be in the same broadcast domain as the affected device (Layer 2 adjacent). Cisco has released firmware updates that address these vulnerabilities.

Metrics

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sb220-lldp-multivuls-mVRUtQ8T CVEVendor Advisory
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sb220-lldp-multivuls-mVRUtQ8T [email protected]Vendor Advisory

Weakness Enumeration

CWE-IDCWE NameSource
CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')[email protected]
CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')[email protected]

Affected Products

ProductVersions

Change History

6 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2021-34780
NVD Published Date:
Oct 6, 2021
NVD Last Modified:
Jun 17, 2026
Source:
[email protected]
CVE-2021-34780 Details - Not Deferred