CVE-2019-18666Network attack vector

Unauthenticated telnet exposure via undocumented HTTP request

Published May 15, 2020 · Updated Aug 5, 2024

Missing authentication in D-Link DAP-1360 Fx firmware 6.13EUb01 and earlier allows remote attackers to enable the telnet daemon. The web interface processes an undocumented HTTP request by starting telnet without checking authorization, exposing a remote shell service that is otherwise disabled. No credentials or user interaction are required; firmware through 6.12b01 also uses weak root credentials that grant remote root access, while later affected firmware still exposes telnet.

CVSS severity9.8
Critical
EPSS probability3.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authentication in D-Link DAP-1360 Fx firmware 6.13EUb01 and earlier allows remote attackers to enable the telnet daemon. The web interface processes an undocumented HTTP request by starting telnet without checking authorization, exposing a remote shell service that is otherwise disabled. No credentials or user interaction are required; firmware through 6.12b01 also uses weak root credentials that grant remote root access, while later affected firmware still exposes telnet.

The record

CVE
CVE-2019-18666
Published
May 15, 2020
Updated
Aug 5, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-306, T1210
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 15, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 2024Record 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

10.0NIST NVDAV:N/AC:L/Au:N/C:C/I:C/A:C
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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-306Missing Authentication for Critical Function
T1210Exploitation of Remote Services

Public exploit references

No public exploit references are available in this record.

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

Technologies

Your stack

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Your stack

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