CVE-2021-21816: D-Link Dir-3040 Firmware

Medium severity, CVSS 4.3. EPSS: 32.4% chance of exploitation in the next 30 days.

An information disclosure vulnerability exists in the Syslog functionality of D-LINK DIR-3040 1.13B03. A specially crafted network request can lead to the disclosure of sensitive information. An attacker can send an HTTP request to trigger this vulnerability.

Affected products

• D-Link Dir-3040 Firmware: version 1.13b03 only

Published 2021-07-16. Last modified 2026-06-17.