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).
Advisories
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Fixes
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
References
History
Thu, 16 Jul 2026 19:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
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Thu, 16 Jul 2026 18:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | 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). | |
| First Time appeared |
Dd-wrt
Dd-wrt dd-wrt |
|
| Weaknesses | CWE-121 | |
| CPEs | cpe:2.3:a:dd-wrt:dd-wrt:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Dd-wrt
Dd-wrt dd-wrt |
|
| References |
|
|
| Metrics |
cvssV3_1
|
Projects
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Status: PUBLISHED
Assigner: mitre
Published:
Updated: 2026-07-16T18:24:38.274Z
Reserved: 2021-02-10T00:00:00.000Z
Link: CVE-2021-27137
Updated: 2026-07-16T18:24:33.515Z
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OpenCVE Enrichment
No data.
Weaknesses