high
7.4
CWE
401 119
Advisory Published
Updated

CVE-2021-1251: Cisco Small Business RV Series Routers Link Layer Discovery Protocol Vulnerabilities

First published: Thu Apr 08 2021(Updated: )

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).

Credit: ykramarz@cisco.com

Affected SoftwareAffected VersionHow to fix
Cisco Rv132w Firmware=1.0.1.14
Cisco Rv132w Firmware=1.0.3.20
Cisco RV132W
Cisco Rv134w Firmware=1.0.1.14
Cisco Rv134w Firmware=1.0.3.20
Cisco RV134W
Cisco Rv160 Firmware=1.0.1.14
Cisco Rv160 Firmware=1.0.3.20
Cisco Rv160
Cisco Rv160w Firmware=1.0.1.14
Cisco Rv160w Firmware=1.0.3.20
Cisco Rv160w
Cisco Rv260 Firmware=1.0.1.14
Cisco Rv260 Firmware=1.0.3.20
Cisco Rv260
Cisco Rv260p Firmware=1.0.1.14
Cisco Rv260p Firmware=1.0.3.20
Cisco Rv260p
Cisco Rv260w Firmware=1.0.1.14
Cisco Rv260w Firmware=1.0.3.20
Cisco Rv260w
Cisco Rv340 Firmware=1.0.1.14
Cisco Rv340 Firmware=1.0.3.20
Cisco RV340
Cisco Rv340w Firmware=1.0.1.14
Cisco Rv340w Firmware=1.0.3.20
Cisco Rv340w
Cisco Rv345 Firmware=1.0.1.14
Cisco Rv345 Firmware=1.0.3.20
Cisco Rv345
Cisco Rv345p Firmware=1.0.1.14
Cisco Rv345p Firmware=1.0.3.20
Cisco Rv345p

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Reference Links

Frequently Asked Questions

  • What is CVE-2021-1251?

    CVE-2021-1251 is a vulnerability in the Link Layer Discovery Protocol (LLDP) implementation for Cisco Small Business RV Series Routers.

  • What is the severity of CVE-2021-1251?

    CVE-2021-1251 has a severity rating of 7.4 (high).

  • How can an attacker exploit CVE-2021-1251?

    An unauthenticated, adjacent attacker could execute arbitrary code or cause an affected router to leak system memory or reload.

  • Which software versions are affected by CVE-2021-1251?

    Cisco Small Business RV Series Routers with firmware versions 1.0.1.14 and 1.0.3.20 are affected by CVE-2021-1251.

  • How can I fix CVE-2021-1251?

    Cisco has released firmware updates to address the vulnerability. Refer to the Cisco Security Advisory for more information.

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