CVE-2020-9438Network attack vector

Unauthorized door unlocking via replayed requests

Published Jun 23, 2020 · Updated Aug 4, 2024

Authentication bypass in Tinxy Door Lock firmware before 3.2 allows remote attackers to unlock a door by replaying an authorized request. The firmware accepts a previously valid Unlock request after the sender's door access has been revoked instead of requiring a fresh authorization decision. The attacker must have captured the request while authorized; replaying it later grants physical entry by unlocking the associated door.

CVSS severity5.9
Medium
EPSS probability0.67%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in Tinxy Door Lock firmware before 3.2 allows remote attackers to unlock a door by replaying an authorized request. The firmware accepts a previously valid Unlock request after the sender's door access has been revoked instead of requiring a fresh authorization decision. The attacker must have captured the request while authorized; replaying it later grants physical entry by unlocking the associated door.

The record

CVE
CVE-2020-9438
Published
Jun 23, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-294
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 23, 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

4.3NIST NVDAV:N/AC:M/Au:N/C:N/I:P/A:N
5.9NIST NVDCVSS:3.1/AV:N/AC:H/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.

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-294Authentication Bypass by Capture-replay

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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