CVE-2018-0296

Cisco ASA suffered a DoS vulnerability from improper HTTP URL input validation that was actively exploited in the wild.

The Cisco Adaptive Security Appliance (ASA) contained an improper input validation flaw with HTTP URLs, allowing attackers to trigger denial-of-service or information disclosure. This failure matters to DIB organizations because edge security devices like the ASA are critical infrastructure; if compromised or taken offline, it disrupts network security and violates CMMC/NIST 800-171 controls requiring continuous monitoring and patching. Organizations must ensure all ASA devices are patched and monitored for exploitation attempts.

Shame score — The vulnerability was actively exploited in the wild (KEV) and linked to CISA emergency directives, indicating negligent patching and avoidable exposure.