RCE in D-Link Dns-320l
CVE-2026-82689
A vulnerability was detected in D-Link DNS-320L, DNS-327L, DNS-340L and DNS-345 up to 20260717. Affected is an unknown function of the file /cgi-bin/isomount_mgr.cgi of the component ISO Image Handler. The manipulation of the argument upIsoRootPath results in os command injection. The attack can be executed remotely. The exploit is now public and may 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 (88.2th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 88th percentile — 88.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.024 · newest: 0.033 · change: +0.009
Affected products
- D-Link Dns-320l — versions 20260717
- D-Link Dns-327l — versions 20260717
- D-Link Dns-340l — versions 20260717
- D-Link Dns-345 — versions 20260717
Weakness classification (CWE)
References
- vuldb.com/vuln/397177 (technical-description, vdb-entry)
- vuldb.com/vuln/397177/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-82689 (third-party-advisory)
- vuldb.com/submit/894201 (third-party-advisory)
- github.com/dxz0069/WAVLINK-WN530H4-Command-Injection-in-set_add_routing/blob/ma… (exploit)
- www.dlink.com/ (product)
Frequently asked questions
- What is CVE-2026-82689?
- CVE-2026-82689 is a critical-severity vulnerability in D-Link Dns-320l, classified under Command Injection. CVSS score: 9.9/10. Published 2026-08-31.
- How severe is CVE-2026-82689?
- Critical severity. CVSS v3 base score is 9.9 out of 10.