CVE-2020-13787Public exploitNetwork attack vector

Guest Wi-Fi password disclosure via cleartext transmission

Published Jun 3, 2020 · Updated Aug 4, 2024

Cleartext transmission in D-Link DIR-865L Ax firmware 1.20B01 Beta allows attackers to read guest Wi-Fi passwords from network traffic. The adv_gzone.php guest-network page transmits the WEP password without transport encryption when an administrator selects WEP security. Attackers able to sniff the traffic need no router account and obtain the guest-network credential, without gaining configuration access from this flaw alone.

CVSS severity7.5
High
EPSS probability0.90%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cleartext transmission in D-Link DIR-865L Ax firmware 1.20B01 Beta allows attackers to read guest Wi-Fi passwords from network traffic. The adv_gzone.php guest-network page transmits the WEP password without transport encryption when an administrator selects WEP security. Attackers able to sniff the traffic need no router account and obtain the guest-network credential, without gaining configuration access from this flaw alone.

The record

CVE
CVE-2020-13787
Published
Jun 3, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-319, T1040
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 3, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 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

7.5INCIBE-CERTCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
5.0INCIBE-CERTAV:N/AC:L/Au:N/C:P/I:N/A:N

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.

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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 exploitPublished

Weakness, pattern, technique

CWE-319Cleartext Transmission of Sensitive Information
T1040Network Sniffing

Public exploit references

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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