PoC Index85,100 CVEs with PoCs

CVE-2021-27137

KEVHIGH 8.1EPSS 4.0%

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).

Affected
DD-WRT
CVSS v3.1 MITRE
8.1 HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS
4.00% chance of exploitation in the next 30 days, 90th percentile
CISA KEV
added 2026-07-21
Published
2026-07-16
Updated
2026-07-22

Exploit collections (1)

Security advisories

References