CVE-2021-21819

Severity: high (CVSS 7.2 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.9% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2021-07-16 · updated 2026-06-17
Weakness: CWE-78

Description

A code execution vulnerability exists in the Libcli Test Environment functionality of D-LINK DIR-3040 1.13B03. A specially crafted network request can lead to arbitrary command execution. An attacker can send a sequence of requests to trigger this vulnerability.

Affected products

D-Link DIR-3040: 1.13b03

References

https://talosintelligence.com/vulnerability_reports/TALOS-2021-1284
https://talosintelligence.com/vulnerability_reports/TALOS-2021-1284

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