CVE-2018-0174Actively exploitedAdded to KEV 2022-03-03

Cisco IOS Software and Cisco IOS XE Software Improper Input Validation Vulnerability

Cisco, IOS XE Software

Description

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).

CVSS severity for this advisory hasn't been enriched from NVD yet, check back shortly.

EPSS, exploit probability

Medium

7.6%

estimated chance of real-world exploitation in the next 30 days, higher than 94.5% of every CVE FIRST.org scores

Refreshed 10/28/2026, via FIRST.org's EPSS model, not CVSS, this measures likelihood of exploitation, not how severe it would be.

Required action

Apply updates per vendor instructions.

CISA-recommended due date: 2022-03-17

CWE-20

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