Vulnerability Intelligence Report
DD-WRT 45723 - UPNP Buffer Overflow
CVE-2021-47854
DD-WRT version 45723 contains a buffer overflow vulnerability in the UPNP network discovery service that allows remote attackers to potentially execute arbitrary code. Attackers can send crafted M-SEARCH packets with oversized UUID payloads to trigger buffer overflow conditions on the target device.
Memory Corruption
No Active Exploit Signals
CVSS Base Score
8.7
HIGH
EPSS Probability:0.97%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
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Authentication
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Weaponization
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SSVC Action
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Weaknesses (CWE)
CWE-120 ↗Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| embeDD GmbH | DD-WRT | 45723 (affected) |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | VulnCheck · Bug Bounty Provider · USA |
| Reserved | 2026-01-14T17:11:19 |
| Published | 2026-01-21T17:27:38 |
| Patch Date | 2021-03-24 |
| Last Updated | 2026-07-28T01:47:25 |
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