Cisco Catalyst Bidirectional Forwarding Detection Denial-of-Service Vulnerability
CISA lists this Cisco Catalyst 4500 Series Switches and Cisco Catalyst 4500-X Series Switches vulnerability as known exploited. The vendor's advisory has the fixed versions.
CISA catalog record
A vulnerability in the Bidirectional Forwarding Detection (BFD) offload implementation of Cisco Catalyst 4500 Series Switches and Cisco Catalyst 4500-X Series Switches could allow an unauthenticated, remote attacker to cause a crash of the iosd process, causing a denial-of-service (DoS) condition.
- Product
- Catalyst 4500 Series Switches and Cisco Catalyst 4500-X Series Switches
- Added to KEV
- 3 Mar 2022
- Federal remediation due
- 17 Mar 2022
- Known ransomware use
- Not reported
What changed
First observed 14 Oct 2026No field changes in the recorded history.
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