CVE-2020-29323Public exploitNetwork attack vector

Credential disclosure via embedded Telnet defaults

Published Jun 4, 2021 · Updated Aug 4, 2024

Hard-coded credentials in D-Link DIR-885L-MFC firmware 1.15b02 and 1.21b05 allow remote attackers to access the Telnet service. The firmware embeds default Telnet credentials in retrievable form, so unpacking the image exposes authentication material instead of protecting it. No prior authentication or user interaction is required; successful use discloses sensitive firmware data without integrity or availability impact.

CVSS severity7.5
High
EPSS probability1.41%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Hard-coded credentials in D-Link DIR-885L-MFC firmware 1.15b02 and 1.21b05 allow remote attackers to access the Telnet service. The firmware embeds default Telnet credentials in retrievable form, so unpacking the image exposes authentication material instead of protecting it. No prior authentication or user interaction is required; successful use discloses sensitive firmware data without integrity or availability impact.

The record

CVE
CVE-2020-29323
Published
Jun 4, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-798, CWE-522, T1552.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 4, 2021CVE 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

5.0NIST NVDAV:N/AC:L/Au:N/C:P/I:N/A:N
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/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 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-798Use of Hard-coded Credentials
CWE-522Insufficiently Protected Credentials
T1552.001Credentials In Files

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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