CVE-2023-7005Public exploit

Unlock-key disclosure via response-header protocol downgrade

Published Dec 19, 2024 · Updated Nov 4, 2025

Algorithm downgrade in Hangzhou Sciener TTLock App 6.4.5 allows physically proximate attackers to obtain a paired lock's unlockKey. BluetoothLeService.processCommandResponse trusts the protocol version declared in a lock response instead of the stored version and uses that weaker protocol for subsequent messages. A nearby attacker must keep the real lock busy and induce the app to connect to an impersonation device; the exposed value supports later opening the associated lock.

CVSS severity7.5
High
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Algorithm downgrade in Hangzhou Sciener TTLock App 6.4.5 allows physically proximate attackers to obtain a paired lock's unlockKey. BluetoothLeService.processCommandResponse trusts the protocol version declared in a lock response instead of the stored version and uses that weaker protocol for subsequent messages. A nearby attacker must keep the real lock busy and induce the app to connect to an impersonation device; the exposed value supports later opening the associated lock.

The record

CVE
CVE-2023-7005
Published
Dec 19, 2024
Updated
Nov 4, 2025
Vendor
Hangzhou Sciener Smart Technology Co., Ltd.
Product
TTLock
Classifications
CWE-757, CAPEC-620, T1557
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 19, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 4, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=6.4.5 <=6.4.5

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Hangzhou Sciener Smart Technology Co., Ltd. · TTLockversion=6.4.5 <=6.4.5

Published CVSS scores

7.5CISA-ADPCVSS: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.

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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)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-757Selection of Less-Secure Algorithm During Negotiation ('Algorithm Downgrade')
CAPEC-620Drop Encryption Level
T1557Adversary-in-the-Middle

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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