CVE-2026-1619

HighUpdated

Published: 13 February 2026

Published

13 February 2026

Modified

06 June 2026

KEV Added

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Patch

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CVSS Score v3.1 8.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L

EPSS Score 0.0030 21.2th percentile

Risk Priority 55 floored blend · peak EPSS

Summary

CVE-2026-1619 is a high-severity Authorization Bypass Through User-Controlled Key (CWE-639) vulnerability in Uni-Yaz Flexcity. Its CVSS base score is 8.3 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation for Privilege Escalation (T1068); ranked at the 21.2th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified are NIST 800-53 AC-3 (Access Enforcement) and SI-2 (Flaw Remediation).

Deeper analysis

CVE-2026-1619 is an Authorization Bypass Through User-Controlled Key vulnerability (CWE-639) in Universal Software Inc.'s FlexCity/Kiosk software. It enables exploitation of trusted identifiers through user-controlled keys. The issue affects FlexCity/Kiosk versions from 1.0 up to but not including 1.0.36.

Attackers with low privileges (PR:L) can exploit this vulnerability remotely over the network (AV:N) with low attack complexity (AC:L) and no user interaction (UI:N). Successful exploitation results in high confidentiality (C:H) and integrity (I:H) impacts, with low availability impact (A:L), yielding a CVSS v3.1 base score of 8.3 in an unchanged scope (S:U).

The USOM advisory at https://www.usom.gov.tr/bildirim/tr-26-0065 provides details on the vulnerability, with mitigation achieved by updating to FlexCity/Kiosk version 1.0.36 or later.

OWASP Top 10 for Web (2025)

EU & UK References

🇪🇺 ENISA EUVD: EUVD-2026-7380

Vulnerability details

Authorization Bypass Through User-Controlled Key vulnerability in Universal Software Inc. FlexCity/Kiosk allows Exploitation of Trusted Identifiers. This issue affects FlexCity/Kiosk: from 1.0 before 1.0.36.

CWE(s): CWE-639

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1068 Exploitation for Privilege Escalation Privilege Escalation

Adversaries may exploit software vulnerabilities in an attempt to elevate privileges.

attack.mitre.org →

T1190 Exploit Public-Facing Application Initial Access

Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.

attack.mitre.org →

Why these techniques?

Authorization bypass (IDOR-style) via user-controlled keys on a remotely accessible app directly enables remote exploitation for privilege escalation and unauthorized access/modification.

Confidence: MEDIUM · MITRE ATT&CK Enterprise v19.0