CVE-2021-27861

Layer 2 network filtering capabilities such as IPv6 RA guard can be bypassed using LLC/SNAP headers with invalid length (and optionally VLAN0 headers)

Severity	MEDIUM
CVSS	4.7
CWE	CWE-130
KEV
Published	3 years ago
Modified	6 months ago

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Cisco NX-OS Software	cisco-sa-VU855201-J3z8CKTX
Cisco IOS XR Software	cisco-sa-VU855201-J3z8CKTX
Cisco IOS XE Software	cisco-sa-VU855201-J3z8CKTX
Cisco IOS	cisco-sa-VU855201-J3z8CKTX
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Cisco Catalyst 9600 Series Switches	cisco-sa-VU855201-J3z8CKTX
Cisco Catalyst 9500 Series Switches	cisco-sa-VU855201-J3z8CKTX
Cisco Catalyst 9400 Series Switches	cisco-sa-VU855201-J3z8CKTX
Cisco Catalyst 9300 Series Switches	cisco-sa-VU855201-J3z8CKTX
Cisco Catalyst 9200 Series Switches	cisco-sa-VU855201-J3z8CKTX