CVE-2021-3017Network attack vector

Credential disclosure via password embedded in HTML

Published Apr 14, 2021 · Updated Aug 3, 2024

Information disclosure in Intelbras WIN 300 and WRN 342 firmware through 2021-01-04 allows remote attackers to read wireless credentials. The routers' web interface embeds the wireless password in a def_wirelesspassword line returned in the page's HTML source. No authentication or user interaction is required; exposure is limited to credentials disclosed by the interface, with no reported data modification or service interruption.

CVSS severity7.5
High
EPSS probability63.02%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in Intelbras WIN 300 and WRN 342 firmware through 2021-01-04 allows remote attackers to read wireless credentials. The routers' web interface embeds the wireless password in a def_wirelesspassword line returned in the page's HTML source. No authentication or user interaction is required; exposure is limited to credentials disclosed by the interface, with no reported data modification or service interruption.

The record

CVE
CVE-2021-3017
Published
Apr 14, 2021
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1212
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 14, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
5.0NIST NVDAV: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.

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 exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1212Exploitation for Credential Access

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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