CVE-2016-20017
CriticalExploitedPublic exploitD-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
Key Facts
Patch immediately- CVE-2016-20017 is a critical-severity vulnerability (CVSS 9.8 v3.1) affecting Dsl-2750b Firmware (Dlink).
- It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Jun 15, 2018. Public exploit code is available.
- EPSS estimates a 67% probability of exploitation in the next 30 days.
- Fixed versions are available, including Dsl-2750b Firmware 1.05.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
67%
Higher than 99.2% of all scored CVEs
Exploited in the wild
Yes
4 catalog listings
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2016-20017 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
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.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CISA KEV | Jan 8, 2024 | Jan 29, 2024 | Not reported |
| Industry KEV feed | Jun 15, 2018 | Jan 29, 2024 | Not reported |
| CIRCL KEV | Jan 8, 2024 | Jan 29, 2024 | Not reported |
| ENISA EUVD | Jan 8, 2024 | n/a | Not reported |
Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Affected Products
1 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Dsl-2750b FirmwareDlink | See advisory | 1.05 |
Patched Releases
Dsl-2750b Firmware
1.05
Timeline
Added to Industry KEV feed
Jun 15, 2018
Publicly disclosed
Oct 19, 2022
Added to CISA KEV
Jan 8, 2024
Added to CIRCL KEV
Jan 8, 2024
Added to ENISA EUVD
Jan 8, 2024
Last updated
Nov 5, 2025
Weakness Type
- CWE-77 Improper Neutralization of Special Elements used in a Command ('Command Injection')
References
- patchhttps://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10088
- exploitVulnCheck exploitation report
- exploitVulnCheck exploitation report
- exploitVulnCheck exploitation report
- exploitMSF dlink_dsl2750b_exec_noauth.rb
FAQ
Common 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.
Affected: Dsl-2750b Firmware (Dlink). The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Jun 15, 2018.
Yes. It was added on Jan 8, 2024 with a federal remediation due date of Jan 29, 2024.
Public exploit code is available.
Fixed versions are available, including Dsl-2750b Firmware 1.05.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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