CVE-2016-20017Known exploitationPublic exploitNetwork attack vector

Unauthenticated command execution via login.cgi cli injection

Published Oct 19, 2022 · Updated Oct 21, 2025

OS command injection in D-Link DSL-2750B Dx firmware before 1.05 allows remote attackers to execute arbitrary commands via login.cgi. The login.cgi handler passes the unauthenticated cli parameter into a shell command without neutralizing command separators. No credentials are required; successful requests grant control of the router, and Satori botnet payloads exploited the flaw in the wild.

CVSS severity9.8
Critical
EPSS probability65.23%
Next 30 days · Sep 16, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in D-Link DSL-2750B Dx firmware before 1.05 allows remote attackers to execute arbitrary commands via login.cgi. The login.cgi handler passes the unauthenticated cli parameter into a shell command without neutralizing command separators. No credentials are required; successful requests grant control of the router, and Satori botnet payloads exploited the flaw in the wild.

The record

CVE
CVE-2016-20017
Published
Oct 19, 2022
Updated
Oct 21, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-77, T1190, T1059.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 15, 2018Exploitation reportedSatori worm exploitation of DSL-2750B
  2. Oct 19, 2022CVE publishedPublication date reported by the CVE source.
  3. Oct 21, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationReported
Public exploitPublished

Weakness, pattern, technique

CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')
T1190Exploit Public-Facing Application
T1059.004Unix Shell

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Reported exploitation

Technologies

Your stack

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Your stack

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