CVE Watch—

CVE-2017-12231

Cisco IOS Software Network Address Translation Denial-of-Service Vulnerability

CVSS

—

No CVSS

EPSS

7.1%

p94

KEV

YES

Mar 3, 2022

Exploit Today

0-100

Published: — · Last modified: —

EPSS · 30d

7.1%EPSS · 30 days7.1%

2026-09-172026-10-15

KEV catalog record

Product

Cisco / IOS software

Vulnerability

Cisco IOS Software Network Address Translation Denial-of-Service Vulnerability

Added to KEV

Mar 3, 2022

Remediate by

Mar 24, 2022

Known ransomware use

Summary description

A vulnerability in the implementation of Network Address Translation (NAT) functionality in Cisco IOS could allow an unauthenticated, remote attacker to cause a denial of service.

Required action

Apply updates per vendor instructions.

Notes

https://nvd.nist.gov/vuln/detail/CVE-2017-12231

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