CVE-2021-47854 - CVE House
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Status published High CVE-2021-47854

DD-WRT 45723 - UPNP Buffer Overflow

Vulnerability Description

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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

  • Selim Enes 'Enesdex' Karaduman

Affected Vendor

embeDD GmbH

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Affected Software

DD-WRT
Vulnerable Versions:
45723

Timeline

Official Publish: January 21st, 2026
Last Modified: January 22nd, 2026
Added to House: July 21st, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weaknesses (CWE)