CVE-2021-21913

9.8 criticalEPSS 2.2%

Critical (9.8) in dlink dir-3040 firmware. EPSS 2.2% chance of exploitation in the next 30 days.

An information disclosure vulnerability exists in the WiFi Smart Mesh functionality of D-LINK DIR-3040 1.13B03. A specially-crafted network request can lead to command execution. An attacker can connect to the MQTT service to trigger this vulnerability.

Severity

CVSS 3.1

9.8 critical

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

EPSS: 2.2% chance of exploitation in the next 30 days; higher than 82% of CVEs (scores of 2026-10-31)
CWE: CWE-798
Published: 2021-09-23
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

dlink:dir-3040_firmware

References

https://talosintelligence.com/vulnerability_reports/TALOS-2021-1361
https://talosintelligence.com/vulnerability_reports/TALOS-2021-1361

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