Cyber Resilience

CVE-2023-1749

Medium

Published: 04 April 2023

Published
04 April 2023
Modified
21 November 2024
KEV Added
—
Patch
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CVSS Score v3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
EPSS Score 0.0015 35.7th percentile
Risk Priority 13 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2023-1749 is a medium-severity Authorization Bypass Through User-Controlled Key (CWE-639) vulnerability in Getnexx Nxal-100 Firmware. Its CVSS base score is 6.5 (Medium).

Operationally, ranked at the 35.7th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability details

The listed versions of Nexx Smart Home devices lack proper access control when executing actions. An attacker with a valid NexxHome deviceId could send API requests that the affected devices would execute.

CWE(s)
CWE-639

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

getnexx
nxal-100 firmware
≤ nxal100v-p1-9-1
getnexx
nxg-100b firmware
≤ nxg100bv-p3-4-1
getnexx
nxpg-100w firmware
≤ nxpg100cv4-0-0
getnexx
nxg-200 firmware
≤ nxg200v-p3-4-1

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

AC-24 Access Control Decisions
addresses: CWE-639

Per-request decision making makes it harder to bypass authorization using user-controlled keys without proper validation in the decision process.

AC-3 Access Enforcement
addresses: CWE-639

Consistent enforcement of approved authorizations makes bypassing via user-controlled keys ineffective.

References