March 3, 2022 · Applied Cybernetics Group
CVE-2018-0173 — Cisco IOS and IOS XE Software
Cisco IOS and IOS XE Software Improper Input Validation Vulnerability
- Added to KEV
2022-03-03- Federal due date
2022-03-17- Vendor
- Cisco
- Product
- IOS and IOS XE Software
- EPSS
- 90.3th percentile (score 0.054, as of
2026-06-08) - NVD CVSS v3.1
- —
- Ransomware use
- Unknown
- Upstream
- https://nvd.nist.gov/vuln/detail/CVE-2018-0173
CISA short 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).
Required action
Apply updates per vendor instructions.