PT-2026-3807 · Embedd Gmbh · Dd-Wrt

Published 2026-01-21 · Updated 2026-01-21 · CVE-2021-47854

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

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

Name of the Vulnerable Software and Affected Versions DD-WRT version 45723

Description A buffer overflow exists in the UPNP network discovery service. Remote attackers can trigger this condition by sending crafted M-SEARCH packets containing oversized UUID payloads, potentially leading to arbitrary code execution.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Buffer Overflow

Weakness Enumeration

CWE-120

Related Identifiers

CVE-2021-47854

Affected Products

Dd-Wrt

References · 6

• 🔥 https://exploit-db.com/exploits/49730 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2021-47854 · Security Note
• https://download1.dd-wrt.com/dd-wrtv2/downloads/betas/2021 · Note
• https://dd-wrt.com · Note
• https://ssd-disclosure.com/ssd-advisory-dd-wrt-upnp-buffer-overflow · Note
• https://vulncheck.com/advisories/dd-wrt-upnp-buffer-overflow · Note