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.
Published: 2026-01-21
Score: 8.7 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Fri, 23 Jan 2026 16:45:00 +0000

Type Values Removed Values Added
First Time appeared Dd-wrt
Dd-wrt dd-wrt
Vendors & Products Dd-wrt
Dd-wrt dd-wrt

Thu, 22 Jan 2026 16:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Wed, 21 Jan 2026 17:45:00 +0000

Type Values Removed Values Added
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.
Title DD-WRT 45723 - UPNP Buffer Overflow
Weaknesses CWE-120
References
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 8.7, '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'}


cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-01-22T15:11:53.533Z

Reserved: 2026-01-14T17:11:19.903Z

Link: CVE-2021-47854

cve-icon Vulnrichment

Updated: 2026-01-22T15:11:49.629Z

cve-icon NVD

Status : Deferred

Published: 2026-01-21T18:16:15.003

Modified: 2026-04-15T00:35:42.020

Link: CVE-2021-47854

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-01-22T10:14:51Z

Weaknesses