D-Link DSL-2750B Devices Command Injection Vulnerability (CVE-2016-20017)

D-Link DSL-2750B devices contain a command injection vulnerability that allows remote, unauthenticated command injection via the login.cgi cli parameter.

Published Oct 19, 2022 · Updated May 17, 2026

Why patchRisk explained in plain English

Worst-case scenarioIf unpatched

A remote attacker, without authentication, can achieve full data confidentiality loss, arbitrary modification of data, complete denial of service or system unavailability. Federal agencies are required to remediate by 2024-01-29 under CISA BOD 22-01.

How the attack worksNo clicks needed

This is a Command Injection (CWE-77) vulnerability in D-Link DSL-2750B Devices. Exploitation requires remote network access, low attack complexity, no authentication required, and no user interaction required.

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Phishing link

→

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Malicious file

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Server compromised

Am I affected?Quick check

Probably yes if any of these apply:

●IT Security

●Running dsl-2750b firmware: v < 1.05

Real-world incidentsWhat we've seen

Active exploitation documented in the wild. Threat-research write-up: https://seclists.org/fulldisclosure/2016/Feb/53

How to patch

Manual remediation steps

Identify affected hosts: query inventory for general installs in scope.

Apply the vendor security update referenced in CVE-2016-20017's advisory. No specific KB/version is encoded yet — consult the linked MSRC/vendor URL.

Verify the fix per the vendor's published verification steps.

Document the remediation in your change ticket and re-scan with your vulnerability scanner to confirm closure.

PowerShell automationComing soon

No tested PowerShell script for this entry yet. We’re prioritising automation based on user demand.

References

↗ CVE-2016-20017 ↗ MSRC Advisory ↗ NVD ↗ Vendor Advisory