March 3, 2022 · Applied Cybernetics Group
CVE-2017-12240 — Cisco IOS and IOS XE Software
Cisco IOS and IOS XE Software DHCP Remote Code Execution Vulnerability
- Added to KEV
2022-03-03- Federal due date
2022-03-24- Vendor
- Cisco
- Product
- IOS and IOS XE Software
- EPSS
- 93.5th percentile (score 0.107, as of
2026-06-08) - NVD CVSS v3.1
- —
- Ransomware use
- Unknown
- Upstream
- https://nvd.nist.gov/vuln/detail/CVE-2017-12240
CISA short 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.