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TI-2023-16740 Aliases CVE-2023-33868GHSA-vvgv-54pp-4xr8

PiiGAB M-Bus Improper Restriction of Excessive Authentication Attempts

Priority MEDIUM 43CWE-307Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-307.

Summary

The number of login attempts is not limited. This could allow an attacker to perform a brute force on HTTP basic authentication.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00659 51st percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
PiiGABM-Bus SoftwarePack900S—No fix listedCNA
  • M-Bus SoftwarePack VendorPiiGAB Affected 900S Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:o:piigab:m-bus_900s_firmware:-:*:*:*:*:*:*:*not specified by NVDVulnerablePiiGAB
cpe:2.3:h:piigab:m-bus_900s:-:*:*:*:*:*:*:*not specified by NVDRunning onPiiGAB
  • cpe:2.3:o:piigab:m-bus_900s_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·PiiGAB
  • cpe:2.3:h:piigab:m-bus_900s:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·PiiGAB

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-33868
  2. 2026-10-03 Alias added: GHSA-vvgv-54pp-4xr8
  3. 2026-10-09 EPSS moved to the 50th–90th percentile

References

Advisory 1

  • TI-2023-18047 PiiGAB M-Bus Use of Hard-coded Credentials CVSS 3.1CRITICAL 9.8
  • TI-2023-17484 PiiGAB M-Bus Weak Password Requirements CVSS 3.1CRITICAL 9.8
  • TI-2023-17259 PiiGAB M-Bus Use of Password Hash With Insufficient Computational Effort CVSS 3.1CRITICAL 9.8
  • TI-2023-18649 PiiGAB M-Bus Code Injection CVSS 3.1CRITICAL 9.8
  • TI-2023-17571 PiiGAB M-Bus Cross-Site Request Forgery CVSS 3.1HIGH 8.8
  • TI-2023-14961 PiiGAB M-Bus Unprotected Transport of Credentials CVSS 3.1HIGH 7.5
See all 8 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences