CVE-2021-27137 1

Vulnerability (CVE)

CVE-2021-27137: DD-WRT Stack-Based Buffer Overflow Vulnerability

Known Exploited Vulnerabilities CISA KEV Catalog Jul 21, 2026

DD-WRT contains a stack-based buffer overflow vulnerability that could allow an unauthenticated attacker to overflow an internal buffer used by UPnP and trigger a code execution vulnerability.

Vulnerabilities & Patching