3.3
CVSSv2

CVE-2021-1621

Published: 23/09/2021 Updated: 07/11/2023
CVSS v2 Base Score: 3.3 | Impact Score: 2.9 | Exploitability Score: 6.5
CVSS v3 Base Score: 7.4 | Impact Score: 4 | Exploitability Score: 2.8
VMScore: 294
Vector: AV:A/AC:L/Au:N/C:N/I:N/A:P

Vulnerability Summary

A vulnerability in the Layer 2 punt code of Cisco IOS XE Software could allow an unauthenticated, adjacent malicious user to cause a queue wedge on an interface that receives specific Layer 2 frames, resulting in a denial of service (DoS) condition. This vulnerability is due to improper handling of certain Layer 2 frames. An attacker could exploit this vulnerability by sending specific Layer 2 frames on the segment the router is connected to. A successful exploit could allow the malicious user to cause a queue wedge on the interface, resulting in a DoS condition.

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Vendor Advisories

A vulnerability in the Layer 2 punt code of Cisco IOS XE Software could allow an unauthenticated, adjacent attacker to cause a queue wedge on an interface that receives specific Layer 2 frames, resulting in a denial of service (DoS) condition This vulnerability is due to improper handling of certain Layer 2 frames An attacker could exploit this v ...