Cisco IOS Software and Cisco IOS XE Software UDP Packet Processing Denial-of-Service Vulnerability
CISA lists this Cisco IOS and IOS XE Software vulnerability as known exploited. The vendor's advisory has the fixed versions.
CISA catalog record
A vulnerability in the UDP processing code of Cisco IOS and IOS XE could allow an unauthenticated, remote attacker to cause the input queue of an affected system to hold UDP packets, causing an interface queue wedge and denial of service.
- Product
- IOS and IOS XE Software
- Added to KEV
- 3 Mar 2022
- Federal remediation due
- 24 Mar 2022
- Known ransomware use
- Not reported
What changed
First observed 14 Oct 2026No field changes in the recorded history.
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