Cyber Resilience

CVE-2016-11021

RCE in Dlink Dcs-930L Firmware ≤ 2.12

CISA KEVActive ExploitationEUVD ExploitedPublic PoCRCECommand Injection
Published
09 March 2020
Modified
05 November 2025
KEV Added
25 March 2022
CVSS Score v3.1 7.2
Click a component to see what it means
Raw vectorCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.69 99.3th percentile
Risk Priority 79 floored blend · peak EPSS

Summary

CVE-2016-11021 is a high-severity OS Command Injection (CWE-78) vulnerability in Dlink Dcs-930L Firmware. Its CVSS base score is 7.2 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Command and Scripting Interpreter (T1059); ranked in the top 0.7% of CVEs by exploit likelihood; CISA has added it to the Known Exploited Vulnerabilities catalog; a public proof-of-concept is referenced.

Deeper analysis AI-assisted summary

Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.

CVE-2016-11021 is an OS command injection vulnerability (CWE-78) affecting the setSystemCommand function on D-Link DCS-930L network cameras running firmware versions prior to 2.12. The flaw resides in the handling of the SystemCommand parameter, which is passed directly to the underlying operating system without proper sanitization.

A remote attacker who has obtained administrative credentials can supply arbitrary OS commands through this parameter over the network. Successful exploitation grants the ability to execute code with full privileges on the device, resulting in complete control over confidentiality, integrity, and availability of the camera.

Public exploit code has been available since at least 2015, and the vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog, confirming observed in-the-wild use. Upgrading to firmware version 2.12 or later removes the affected setSystemCommand interface.

OWASP Top 10 for Web (2025)

A05:2025 Injection

EU & UK References

Vulnerability Data

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.

CWE(s)
CWE-78
KEV Date Added
25 March 2022

Related Threats

MITRE ATT&CK Enterprise Techniques

T1059 Command and Scripting Interpreter Execution
Adversaries may abuse command and script interpreters to execute commands, scripts, or binaries.
attack.mitre.org →
T1059.003 Windows Command Shell Execution
Adversaries may abuse the Windows command shell for execution.
attack.mitre.org →
T1059.004 Unix Shell Execution
Adversaries may abuse Unix shell commands and scripts for execution.
attack.mitre.org →
T1059.001 PowerShell Execution
Adversaries may abuse PowerShell commands and scripts for execution.
attack.mitre.org →
T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2019-17621Same vendor: Dlinkboth on KEV
CVE-2019-20500Same vendor: Dlinkboth on KEV
CVE-2018-6530Same vendor: Dlinkboth on KEV
CVE-2022-26258Same vendor: Dlinkboth on KEV
CVE-2019-16920Same vendor: Dlinkboth on KEV
CVE-2020-9377Same vendor: Dlinkboth on KEV
CVE-2019-16057Same vendor: Dlinkboth on KEV
CVE-2021-45382Same vendor: Dlinkboth on KEV
CVE-2023-25280Same vendor: Dlinkboth on KEV
CVE-2020-25506Same vendor: Dlinkboth on KEV

Affected Assets

dlink
dcs-930l firmware
≤ 2.12

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)

—

Detect
Catch it (NIST detect / respond)

—

Harden
Shrink the surface (DISA STIG)

—

Validate
Prove the fix (OWASP ASVS)
  • V1.2.5
  • V1.2.8
  • V15.2.5

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

SC-27 Platform-independent Applications
addresses: CWE-78

Platform-independent apps typically execute inside a managed runtime or sandbox that restricts direct OS command execution, reducing the ability to exploit OS command injection.

SI-10 Information Input Validation
addresses: CWE-78

Validates inputs to block special elements that would alter OS command execution.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.PS-06 mostly match
prevents

PR.PS-06's SDLC practices directly require secure coding and input handling that blocks command-injection defects, yet the single broad outcome leaves many specific neutralization vectors and verification gaps unaddressed.

PR.PS-02 partial match
prevents

Routine patching/maintenance can remediate known command-injection CVEs in dependencies (partial forward) but does nothing to stop developers from introducing improper neutralization in custom code (none reverse).

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.8.29 Security testing in development and acceptance mostly match
finds

Security testing and code review target insecure use of operating-system command interfaces, catching command-injection flaws introduced during development.

References