CVE Watch—

CVE-2017-12240

Cisco IOS and IOS XE Software DHCP Remote Code Execution Vulnerability

CVSS

—

No CVSS

EPSS

13.9%

p96

KEV

YES

Mar 3, 2022

Exploit Today

0-100

Published: — · Last modified: —

EPSS · 30d

13.5%EPSS · 30 days13.9%

2026-06-302026-07-16

KEV catalog record

Product

Cisco / IOS and IOS XE Software

Vulnerability

Cisco IOS and IOS XE Software DHCP Remote Code Execution Vulnerability

Added to KEV

Mar 3, 2022

Remediate by

Mar 24, 2022

Known ransomware use

Summary description

The Dynamic Host Configuration Protocol (DHCP) relay subsystem of Cisco IOS and Cisco IOS XE Software contains a vulnerability that could allow an unauthenticated, remote attacker to execute arbitrary code and gain full control of an affected system.

Required action

Apply updates per vendor instructions.

Notes

https://nvd.nist.gov/vuln/detail/CVE-2017-12240

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