CVE-2022-40903

Administrative access via unlimited failed attempts

Published Nov 14, 2022 · Updated Apr 30, 2025

Improper attempt limiting in Aiphone GT-DMB-N 1.0.3 allows attackers to gain administrative privileges via repeated failed access attempts. The administrative authentication path continues accepting attempts after repeated failures instead of enforcing an attempt limit. Adjacent-network access is required; compromise exposes device settings, and altered configuration can release a connected door.

CVSS severity6.5
Medium
EPSS probability0.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper attempt limiting in Aiphone GT-DMB-N 1.0.3 allows attackers to gain administrative privileges via repeated failed access attempts. The administrative authentication path continues accepting attempts after repeated failures instead of enforcing an attempt limit. Adjacent-network access is required; compromise exposes device settings, and altered configuration can release a connected door.

The record

CVE
CVE-2022-40903
Published
Nov 14, 2022
Updated
Apr 30, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-307, T1110
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 14, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 30, 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

6.5NIST NVDCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
6.5CISA-ADPCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
2.9JPCERT/CCAV:A/AC:M/Au:N/C:P/I:N/A:N
4.3JPCERT/CCCVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:L/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 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 exploitUnconfirmed

Weakness, pattern, technique

CWE-307Improper Restriction of Excessive Authentication Attempts
T1110Brute Force

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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