CVE-2017-6627VulnerabilityPublished 03/03/2022Updated 10/24/2026
CVE-2017-6627: Cisco IOS Software and Cisco IOS XE Software UDP Packet Processing Denial-of-Service Vulnerability
Affects Cisco IOS and IOS XE SoftwareSource CISA KEV
Severity
HighNo CVSS score published yet
- Exploitation
Actively exploited – in CISA KEV since 03/03/2022
- KEV deadline
- 03/24/2022
- EPSS
- 6.2% chance of exploitation in 30 days – higher than 93% of CVEs
What to do
CISA required action
Apply updates per vendor instructions.
Description
CVE-2017-6627 is a denial-of-service vulnerability in the UDP packet processing code of Cisco IOS and IOS XE software. An unauthenticated remote attacker can exploit this flaw to cause the input queue to hold UDP packets, resulting in an interface queue wedge and denial of service. This vulnerability has been exploited in the wild.