CVE-2026-85223: D-Link DNS-340L CGI dropbox.cgi os command injection

Severity: critical (CVSS 9.9 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 3.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-09-03 · updated 2026-09-04
Weakness: CWE-77

Description

A vulnerability was found in D-Link DNS-340L 1.01B04. Affected by this issue is some unknown functionality of the file /cgi-bin/dropbox.cgi of the component CGI Handler. Performing a manipulation of the argument callback_url/sync_interval results in os command injection. The attack can be initiated remotely. The exploit has been made public and could be used.

Affected products

D-Link DNS-340L: 1.01B04

References

https://github.com/dxz0069/WAVLINK-WN530H4-Command-Injection-in-set_add_routing/blob/main/DLINK-CMD-008-vulndb.md
https://vuldb.com/cve/CVE-2026-85223
https://vuldb.com/submit/894213
https://vuldb.com/vuln/398422
https://vuldb.com/vuln/398422/cti
https://www.dlink.com/
https://vuldb.com/submit/894213

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