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MEDIUM · 4.3

CVE-2021-34778

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 fo...

Vulnerability 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.

CVSS Score

4.3

MEDIUM

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Attack Vector
ADJACENT_NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
LOW
Availability
NONE

Affected Products

VendorProductVersions
CiscoBusiness 220-8T-E-2G Firmware<= 1.2.0.6
CiscoBusiness 220-8T-E-2G-
CiscoBusiness 220-8P-E-2G Firmware<= 1.2.0.6
CiscoBusiness 220-8P-E-2G-
CiscoBusiness 220-8Fp-E-2G Firmware<= 1.2.0.6
CiscoBusiness 220-8Fp-E-2G-
CiscoBusiness 220-16T-2G Firmware<= 1.2.0.6
CiscoBusiness 220-16T-2G-
CiscoBusiness 220-16P-2G Firmware<= 1.2.0.6
CiscoBusiness 220-16P-2G-
CiscoBusiness 220-24T-4G Firmware<= 1.2.0.6
CiscoBusiness 220-24T-4G-
CiscoBusiness 220-24P-4G Firmware<= 1.2.0.6
CiscoBusiness 220-24P-4G-
CiscoBusiness 220-24Fp-4G Firmware<= 1.2.0.6
CiscoBusiness 220-24Fp-4G-
CiscoBusiness 220-48T-4G Firmware<= 1.2.0.6
CiscoBusiness 220-48T-4G-
CiscoBusiness 220-48P-4G Firmware<= 1.2.0.6
CiscoBusiness 220-48P-4G-

Related Weaknesses (CWE)

CWE-120

References

FAQ

What is CVE-2021-34778?

CVE-2021-34778 is a vulnerability with a CVSS score of 4.3 (MEDIUM). 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 fo...

How severe is CVE-2021-34778?

CVE-2021-34778 has been rated MEDIUM with a CVSS base score of 4.3/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2021-34778?

Check the references section above for vendor advisories and patch information. Affected products include: Cisco Business 220-8T-E-2G Firmware, Cisco Business 220-8T-E-2G, Cisco Business 220-8P-E-2G Firmware, Cisco Business 220-8P-E-2G, Cisco Business 220-8Fp-E-2G Firmware.