CVE-2021-34777CWE-120

Cisco Small Business 220 Series Smart Switches Link Layer Discovery Protocol Vulnerabilities

Medium · published October 6, 2021

CVSS v3.1
4.3
EPSS
0%
Percentile
34.3
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
4.3 · MEDIUM
Vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00411 · 34.3th percentile
Weakness
CWE-120 · Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
Published
2021-10-06T19:45Z
EPSS history
Timeline
  • 06 OCT 19:45Z
    Cisco Small Business 220 Series Smart Switches Link Layer Discovery Protocol Vulnerabilities
    cvelistv5