CVE-2016-11021 D-Link DCS-930L Devices OS Command Injection Vulnerability
setSystemCommand on D-Link DCS-930L devices allows a remote attacker to execute code via an OS command.
From the CISA KEV catalogue version 2026.11.06, with Cybergen analysis. Updated 6 Nov 2026.
Should You Worry?
- CISA confirmed exploitation in the wild and added it to the Known Exploited Vulnerabilities catalogue on 25 Mar 2022.
- Rated High severity (CVSS 7.2, scored by CISA).
- It has been in the catalogue for 1,687 days. Systems still unpatched now have almost certainly been scanned for it.
What It Is
setSystemCommand on D-Link DCS-930L devices before 2.12 allows a remote attacker to execute code via an OS command in the SystemCommand parameter.
What To Do Now
- 1
Find it
Search your asset inventory and external attack surface for D-Link DCS-930L Devices. Include cloud images, appliances and anything a supplier runs for you.
Attack Surface Management - 2
Fix it
The impacted product is end-of-life and should be disconnected if still in use.
Vulnerability Management - 3
Hunt for compromise
If an affected system was reachable before you patched, assume it may have been hit. Check logs, new accounts, web shells and outbound connections from the date of exposure.
Incident Response - 4
Prove it is fixed
Rescan or test the system after patching. Upgrades that fail silently and forgotten secondary instances are common.
Penetration Testing
Vendor Advisories
The Compliance Clock
General guidance, not legal advice. Your obligations depend on your sector, scope and jurisdiction.
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