CISA KEV

CVE-2018-0173

Cisco IOS and IOS XE Software Improper Input Validation Vulnerability

A vulnerability in the Cisco IOS Software and Cisco IOS XE Software function that restores encapsulated option 82 information in DHCP Version 4 (DHCPv4) packets can allow for denial-of-service (DoS).

VendorCisco

ProductIOS and IOS XE Software

EPSS7.7%

Added to KEVMar 03, 2022

Remediation DueMar 17, 2022

Known Ransomware UseUnknown

CWECWE-20

Required Action

Apply updates per vendor instructions.

From Disclosure to Action

Know how quickly you need to move.

For CVE-2018-0173, added to the catalogue on Mar 03, 2022 with a remediation deadline of Mar 17, 2022.

Added to KEVMar 03, 2022

Seraph AlertSame day

Remediation DueMar 17, 2022

ValidationOngoing

Overdue1686 days overdue

Recommended action: Apply vendor remediation guidance.

Seraph Context

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References

https://nvd.nist.gov/vuln/detail/CVE-2018-0173

More from Cisco in the KEV catalogue.

CVE-2026-20349Secure Firewall Adaptive Security Appliance (ASA) and Secure Firewall Threat Defense (FTD) Added Aug 11, 2026 CVE-2026-20316Secure Firewall Management Center (FMC)Added Jul 29, 2026 CVE-2008-4128IOSAdded Jul 13, 2026

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