Vulnerabilities CVE-2021-47854

CVE-2021-47854

High

Open

TLP:CLEAR

DD-WRT 45723 - UPNP Buffer Overflow

NVD CVE.org

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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.

Details

CVSS Score: 8.7
EPSS Score ⓘ: 0.98%

58.9th percentile
CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Confidence: 90%
Published: Jan 21, 2026
Last Modified: Jul 28, 2026

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