Cyber Resilience

CVE-2023-31277

High

Published: 06 July 2023

Published
06 July 2023
Modified
21 November 2024
KEV Added
—
Patch
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CVSS Score v3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS Score 0.0010 27.7th percentile
Risk Priority 15 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2023-31277 is a high-severity Unprotected Transport of Credentials (CWE-523) vulnerability in Piigab M-Bus 900S Firmware. Its CVSS base score is 7.5 (High).

Operationally, ranked at the 27.7th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability details

PiiGAB M-Bus transmits credentials in plaintext format.

CWE(s)
CWE-523

Related Threats

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

Affected Assets

piigab
m-bus 900s firmware
all versions

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.

SC-37 Out-of-band Channels
addresses: CWE-523

Using a distinct channel for credential transmission prevents unprotected transport over the application's normal communication path.

SC-8 Transmission Confidentiality and Integrity
addresses: CWE-523

Requiring protected transport for credentials directly mitigates unprotected credential transmission over networks.

SC-9 Transmission Confidentiality
addresses: CWE-523

Prevents unprotected transport of credentials by mandating confidentiality mechanisms such as TLS for all sensitive data flows.

References