How severe is CVE-2016-20017?

CVE-2016-20017 has a CVSS score of 9.8/10, rated CRITICAL. Immediate patching is strongly recommended.

Which packages are affected by CVE-2016-20017?

Affected package information for CVE-2016-20017 is not yet fully mapped. Check the official advisory links for details.

How do I fix CVE-2016-20017?

No fixed version has been published for CVE-2016-20017 yet. Monitor the advisory for updates, apply mitigations recommended by the vendor, and use O3 Security to track when a fix becomes available in your stack.

Is CVE-2016-20017 actively exploited in the wild?

Yes. There are 4 known exploit references for CVE-2016-20017, including 4 in-the-wild exploitations observed on GitHub and other sources. Treat this as actively exploitable and prioritize patching immediately. All exploit code should only be run in an isolated sandbox environment for research or authorized testing — never against production systems without explicit written authorization.

What is the EPSS score for CVE-2016-20017?

CVE-2016-20017 has an EPSS (Exploit Prediction Scoring System) score of 92.1%, placing it in the 100th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. A score above 50% indicates significantly elevated exploitation risk — immediate patching is strongly recommended.

Is CVE-2016-20017 in the CISA Known Exploited Vulnerabilities catalog?

Yes. CVE-2016-20017 (D-Link DSL-2750B Devices Command Injection Vulnerability) was added to CISA's Known Exploited Vulnerabilities (KEV) catalog on 2024-01-08. CISA required all US federal civilian agencies to remediate this vulnerability by 2024-01-29. The required action was: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. Being listed in the KEV catalog is the strongest possible confirmation of active exploitation — treat this as a critical priority.

What type of vulnerability is CVE-2016-20017?

CVE-2016-20017 is classified as CWE-77 (CWE-77). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

Which products and versions are affected by CVE-2016-20017?

CVE-2016-20017 affects dlink dsl-2750b firmware. Check the affected-products list on this page against your deployed version to confirm exposure.

When was CVE-2016-20017 published, and has it been updated?

CVE-2016-20017 was published on October 19, 2022 and was last updated on November 5, 2025. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

CISA KEV·Added 2024-01-08 — agencies required to remediate by 2024-01-29

CVE-2016-20017

CRITICAL

D-Link DSL-2750B devices before 1.05 allow remote unauthenticated command injection via the login.cgi cli parameter, as exploited in the wild in 2016 through 2022.

Published

Oct 19, 2022

Updated

Nov 5, 2025

Affected

0 pkgs

Patched

None yet

Exploits

4 known

EPSS Exploitation Probability

via FIRST.org ↗

92.1%probability of exploitation in next 30 days

Very High Risk100th percentile0.00%

EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.

Description

D-Link DSL-2750B devices before 1.05 allow remote unauthenticated command injection via the login.cgi cli parameter, as exploited in the wild in 2016 through 2022.

Affected Products

1 product · 1 configurations

dsl-2750b firmwaredlink

< 1.05

range

Exploits & PoCs

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

D-Link DSL-2750B devices before 1.05 allow remote unauthenticated comman…

exploit-db.comNVDOct 2022

D-Link DSL-2750B devices before 1.05 allow remote unauthenticated comman…

seclists.orgNVDOct 2022

D-Link DSL-2750B devices before 1.05 allow remote unauthenticated comman…

nvd.nist.govAPIJan 2017

D-Link DSL-2750B devices before 1.05 allow remote unauthenticated comman…

cisa.govCISAJan 2024

Frequently Asked Questions

D-Link DSL-2750B devices before 1.05 allow remote unauthenticated command injection via the login.cgi cli parameter, as exploited in the wild in 2016 through 2022.

O3 Security · Impact-Aware SCA

Is CVE-2016-20017 in your stack?

O3 detects CVE-2016-20017 across dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.

Scan my stack How O3 SCA works

CVSS Score

9.8/10

CVSS v3 base score

Vector breakdown

AV:Attack Vector

Network

AC:Attack Complexity

Low

PR:Privileges Required

None

UI:User Interaction

None

S:Scope

Unchanged

C:Confidentiality

High

I:Integrity

High

A:Availability

High

Raw vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CWE Classification

CWE-77CWE-77

Weaponization

No known public exploit tooling found.

Timeline

Disclosed

Oct 19, 2022

First exploit

Oct 21, 2022

3 days after disclosure — rapid exploitation

KEV added

Jan 8, 2024

Last updated

Nov 5, 2025

Identifiers

CVE-2016-20017

References

Fixsupportannouncement.us.dlink.com Fixsupportannouncement.us.dlink.com Exploit / PoCseclists.org Exploit / PoCexploit-db.com Exploit / PoCseclists.org Exploit / PoCexploit-db.com Webcisa.gov

Data from OSV.dev, enriched by O3 Security. Refreshed hourly.