RCE in D-Link Dns-340l
CVE-2026-85223
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.
Vulnerability class: Command Injection (OS Command Injection)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.9 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.033 (88.3th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 88th percentile — 88.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.016 · newest: 0.033 · change: +0.017
Affected products
- D-Link Dns-340l — versions 1.01B04
Weakness classification (CWE)
References
- github.com/dxz0069/WAVLINK-WN530H4-Command-Injection-in-set_add_routing/blob/ma… (exploit)
- vuldb.com/cve/CVE-2026-85223 (third-party-advisory)
- vuldb.com/submit/894213 (third-party-advisory)
- vuldb.com/vuln/398422 (technical-description, vdb-entry)
- vuldb.com/vuln/398422/cti (signature, permissions-required)
- www.dlink.com/ (product)
Frequently asked questions
- What is CVE-2026-85223?
- CVE-2026-85223 is a critical-severity vulnerability in D-Link Dns-340l, classified under Command Injection. CVSS score: 9.9/10. Published 2026-09-03.
- How severe is CVE-2026-85223?
- Critical severity. CVSS v3 base score is 9.9 out of 10.