CVE-2018-0174
Cisco IOS Software and Cisco IOS XE Software Improper Input Validation Vulnerability
Cisco · IOS XE Software
Vulnerability details
A vulnerability in the DHCP option 82 encapsulation functionality of Cisco IOS Software and Cisco IOS XE Software could allow for denial-of-service (DoS).
Added to CISA KEV: 2022-03-03
Ransomware campaign use: Unknown
CISA due date: 2022-03-17
Defensive guidance from CISA
Apply updates per vendor instructions.
This is the source's required-action field, not an independently validated patch procedure. Refer to the vendor for exact affected versions and fixes.
Source catalog date: 2026-11-06T19:44:45.1797Z · Last retrieved: 2026-11-06 21:02:26 UTC