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CVE-2026-19426 – Authentication Bypass (Missing Authentication) – FitSoft POS System (all versions)

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Summary

CVE-2026-19426 is a Missing Authentication for Critical Function vulnerability (CWE-306) affecting the FitSoft POS System. The flaw allows an unauthenticated, remote attacker to directly access and operate the point-of-sale system without providing any credentials. The issue is rated High severity with a CVSS v3.1 base score of 8.2.

Technical details

  • Root cause: The FitSoft POS System fails to enforce authentication controls on critical functions, allowing operations that should require verified credentials to be invoked without any login or identity check.
  • Trigger conditions: No special conditions are required — an attacker simply needs network access to the exposed POS System interface/service.
  • Attack vector: Network (AV:N) — exploitable remotely, with low attack complexity (AC:L), no privileges required (PR:N), and no user interaction (UI:N).
  • Impact: Successful exploitation grants an unauthenticated attacker the ability to directly access and operate the POS system, resulting in low confidentiality impact and high integrity impact, per the CVSS vector (C:L/I:H/A:N). This could allow attackers to view or manipulate POS transaction data or system operations without detection.

Affected software

  • FitSoft POS System — all versions (the advisory does not specify a bounded version range; all currently deployed versions are noted as affected)

Severity

  • CVSS v3.1 Base Score: 8.2 (High)
  • Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N

Mitigation and recommended actions

  • Immediate: No specific patched version has been published in available advisories. Organizations running FitSoft POS System should contact the vendor directly to obtain a fix or confirmation of remediation timeline.
  • If no patch is available:
    • Restrict network access to the POS System to trusted, internal networks only — do not expose the POS management interface or its services directly to the internet.
    • Place the system behind a VPN, firewall, or access-control gateway that enforces authentication before requests reach the POS System.
    • Monitor network traffic and logs for anomalous or unauthenticated access attempts to POS endpoints.
    • Segment POS infrastructure from other business and payment networks to limit the blast radius of unauthorized access.

References

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