CVE-2023-31759Public exploit

Alarm control takeover via fixed-code keyfob replay

Published May 23, 2023 · Updated Jan 17, 2025

Authentication bypass in Kerui W18 Alarm System firmware 1.0 allows physically proximate attackers to control alarm functions via replayed keyfob signals. The 433 MHz keyfob transmits an identical fixed command for repeated presses, and the base station accepts captured transmissions without a rolling code or freshness check. An attacker within radio range must first capture a valid transmission with radio equipment; replay permits arbitrary arming and disarming of the alarm.

CVSS severity7.5
High
EPSS probability0.29%
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 Kerui W18 Alarm System firmware 1.0 allows physically proximate attackers to control alarm functions via replayed keyfob signals. The 433 MHz keyfob transmits an identical fixed command for repeated presses, and the base station accepts captured transmissions without a rolling code or freshness check. An attacker within radio range must first capture a valid transmission with radio equipment; replay permits arbitrary arming and disarming of the alarm.

The record

CVE
CVE-2023-31759
Published
May 23, 2023
Updated
Jan 17, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-294
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 23, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 17, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
7.5CISA-ADPCVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

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)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-294Authentication Bypass by Capture-replay

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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