CVE-2021-1308 HIGH

CVE-2021-1308: Cisco Small Business RV Series Routers Link Layer Discovery Protocol Vulnerabilities

Vendor Cisco
Product Cisco Small Business RV Series Router Firmware
Weakness CWE-119
Published April 8, 2021
Last update November 8, 2024

CVSS base score

7.4/10
Attack vector Adjacent
Attack complexity Low
Privileges required None
User interaction None
Confidentiality None
Integrity None

CVSS vector

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

What the vulnerability does

01Description

Multiple vulnerabilities exist in the Link Layer Discovery Protocol (LLDP) implementation for Cisco Small Business RV Series Routers. An unauthenticated, adjacent attacker could execute arbitrary code or cause an affected router to leak system memory or reload. A memory leak or device reload would cause a denial of service (DoS) condition on an 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).

Key dates

02Disclosure timeline

April 8, 2021 CVE published
November 8, 2024 Record updated