CVE-2023-39841Public exploit

Unauthorized entry via clonable RFID identifiers

Published Aug 15, 2023 · Updated Oct 8, 2024

Missing encryption in the RFID tag of Etekcity 3-in-1 Smart Door Lock 1.0 allows physically proximate attackers to clone access tags. The lock uses a low-frequency RFID tag that stores only an unencrypted identifier, allowing a reader to copy the number and write it to a blank tag. Brief proximity to an enrolled tag is sufficient; a duplicate inherits the original tag's permissions and can unlock the door without alerting the owner.

CVSS severity4.6
Medium
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing encryption in the RFID tag of Etekcity 3-in-1 Smart Door Lock 1.0 allows physically proximate attackers to clone access tags. The lock uses a low-frequency RFID tag that stores only an unencrypted identifier, allowing a reader to copy the number and write it to a blank tag. Brief proximity to an enrolled tag is sufficient; a duplicate inherits the original tag's permissions and can unlock the door without alerting the owner.

The record

CVE
CVE-2023-39841
Published
Aug 15, 2023
Updated
Oct 8, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-311
Attack vector
physical
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 15, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 8, 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 vectorphysical
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

4.6NVDCVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:H/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorphysical
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-311Missing Encryption of Sensitive Data

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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