theinfosecnews
theinfosecnews
Subscribe to Daily Digest

CVE-2018-0173

CISA KEV

Published March 3, 2022 · Updated April 3, 2026

high
Official Description+

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).

Affected Products

VendorProduct
CiscoIOS and IOS XE Software

Patch Status

Patch by 2022-03-17

Recommended Actions

  1. Check if your systems use any of the affected products listed above.
  2. Apply vendor patches immediately if available.
  3. This vulnerability is in CISA's Known Exploited Vulnerabilities catalog — prioritize remediation.
  4. Monitor vendor advisories for updates and additional mitigations.
  5. Review logs for indicators of compromise related to CVE-2018-0173.