March 3, 2022 · Applied Cybernetics Group
CVE-2017-12231 — Cisco IOS software
Cisco IOS Software Network Address Translation Denial-of-Service Vulnerability
- Added to KEV
2022-03-03- Federal due date
2022-03-24- Vendor
- Cisco
- Product
- IOS software
- EPSS
- 92.9th percentile (score 0.093, as of
2026-06-08) - NVD CVSS v3.1
- —
- Ransomware use
- Unknown
- Upstream
- https://nvd.nist.gov/vuln/detail/CVE-2017-12231
CISA short 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.