Vulnerability · Published Sep 3, 2026 · Assigned by VulDB

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

Critical 9.9

In plain English

A critical-severity OS command injection in DNS-340L from D-Link. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 3.3% (higher than 88% of all known vulnerabilities).

Severity (CVSS 3.1)9.9Critical

Exploit odds (30 days)3.3%top 11.5% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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 (as reported)

Vendor	Product	Versions
D-Link	DNS-340L	1.01B04

Weakness: CWE-78, CWE-77 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:R

References

VDB-398422 | D-Link DNS-340L CGI dropbox.cgi os command injection vdb-entry, technical-description
VDB-398422 | CTI Indicators (IOB, IOC, TTP, IOA) signature, permissions-required
CVE-2026-85223 | CVE Analysis and Report third-party-advisory
Submit #894213 | D-Link DNS-340L ShareCenter confirmed DNS-340L firmware builds OS Command Injection third-party-advisory
https://github.com/dxz0069/WAVLINK-WN530H4-Command-Injection-in-set_add_routing/blob/main/DLINK-CMD-008-vulndb.md exploit
https://www.dlink.com/ product