Dd-wrt vulnerabilities
Published CVEs affecting Dd-wrt products: 1 record(s), with severity, exploitation and fixes.
CVE-2021-27137
High · 8.1
KEV High · 55 CWE-121 Jul 16, 2026
DD-WRT Stack-Based Buffer Overflow Vulnerability
An issue was discovered in router/upnp/src/ssdp.c in DD-WRT before 45724. An unsafe strcpy in the UPnP handling functionality allows an unauthenticated remote attacker to send a request that would overflow an internal fixed buffer. Exploitation requires the DD-WRT user to enable UPnP (which is off by default, and only listens on internal interfaces by default). This occurs in ssdp_msearch (reachable by an M-SEARCH request).