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Severity
High
Analysis Summary
CVE-2021-34767
Cisco IOS XE Software for Catalyst 9800 Series Wireless Controllers is vulnerable to a denial of service, caused by a logic error when processing specific link-local IPv6 traffic. By sending a specially-crafted IPv6 packet, a remote attacker could exploit this vulnerability to cause traffic drops in the affected VLAN.
Impact
- Denial of Service
Affected Vendors
- Cisco
Affected Products
- Cisco IOS XE Software
- Cisco Catalyst 9800 Wireless Controllers
- Cisco Catalyst 9800 Wireless Controllers for Cloud
Remediation
Refer to Cisco Advisory for patch, upgrade or suggested workaround information.