Vulnerability · Published Aug 31, 2026 · Assigned by VulDB

CVE-2026-82689D-Link DNS-320L/DNS-327L/DNS-340L/DNS-345 ISO Image isomount_mgr.cgi os command injection

Critical 9.9

In plain English

A critical-severity OS command injection in DNS-320L 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 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.

Affected products (as reported)

Vendor	Product	Versions
D-Link	DNS-320L	20260717
D-Link	DNS-327L	20260717
D-Link	DNS-340L	20260717
D-Link	DNS-345	20260717

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-397177 | D-Link DNS-320L/DNS-327L/DNS-340L/DNS-345 ISO Image isomount_mgr.cgi os command injection vdb-entry, technical-description
VDB-397177 | CTI Indicators (IOB, IOC, TTP, IOA) signature, permissions-required
CVE-2026-82689 | CVE Analysis and Report third-party-advisory
Submit #894201 | D-Link DNS-320L/DNS-327L/DNS-340L/DNS-345 ShareCenter NAS family multiple confirmed ShareCenter firmware builds OS Command Injection third-party-advisory
https://github.com/dxz0069/WAVLINK-WN530H4-Command-Injection-in-set_add_routing/blob/main/DLINK-CMD-003-vulndb.md exploit
https://www.dlink.com/ product