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PatchSiren cyber security CVE debrief

CVE-2016-11021 D-Link CVE debrief

CVE-2016-11021 is a D-Link DCS-930L device vulnerability described in official records as an OS command injection issue. CISA added it to the Known Exploited Vulnerabilities (KEV) catalog on 2022-03-25, which means it is treated as actively exploited in the wild. The KEV entry also states that the impacted product is end-of-life and should be disconnected if still in use.

Vendor
D-Link
Product
DCS-930L Devices
CVSS
Unknown
CISA KEV
Listed
Original CVE published
2022-03-25
Original CVE updated
2022-03-25
Advisory published
2022-03-25
Advisory updated
2022-03-25

Who should care

Organizations, home users, and integrators that still operate D-Link DCS-930L devices should treat this as a high-priority asset risk. Security teams managing legacy or IoT camera fleets should confirm whether any units remain deployed, internet-exposed, or still trusted on internal networks.

Technical summary

Official records identify the issue as an OS command injection vulnerability in D-Link DCS-930L devices. The CISA KEV catalog entry is the strongest available evidence here: it confirms the vulnerability was added to the known-exploited list on 2022-03-25 and notes the product is end-of-life. No additional technical details, attack preconditions, or vendor mitigation guidance were provided in the supplied corpus beyond disconnection for any still-deployed devices.

Defensive priority

High. CISA’s KEV listing indicates known exploitation, and the product is end-of-life, so remediation should focus on removal, isolation, or replacement rather than patch management.

Recommended defensive actions

  • Inventory all D-Link DCS-930L devices and confirm whether any are still deployed.
  • If the devices remain in use, disconnect them from networks as CISA recommends and plan for replacement.
  • Remove any internet exposure immediately, including direct WAN access, port forwards, and remote administration paths.
  • Segregate legacy devices on restricted network segments until they can be retired.
  • Check for any dependency on these cameras in physical security workflows and migrate to supported hardware.
  • Use the official CVE, NVD, and CISA KEV records to track status and document remediation decisions.

Evidence notes

This debrief is based only on the supplied official-source metadata and links: the CISA KEV record, the CVE.org record, and the NVD detail page. The corpus confirms the vulnerability name, product, KEV status, date added to KEV, due date, and end-of-life/disconnect guidance. It does not include a vendor advisory, CVSS score, exploit narrative, or patch availability, so none are inferred here.

Official resources

Publicly disclosed vulnerability later added to CISA’s Known Exploited Vulnerabilities catalog on 2022-03-25. The supplied records do not provide the original disclosure date beyond the CVE record reference.