VULNERABILITY INTELLIGENCE

CVE-2021-1309

CVSS score7.4 HIGH
EPSS probability0.53%
CISA KEVNot currently listed
Published2021-04-08
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Description

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).

Weakness classification

  • psirt@cisco.com: CWE-119
  • nvd@nist.gov: CWE-401

Primary references