What is the CVSS score of CVE-2026-1618?

CVE-2026-1618 has a CVSS 3.1 base score of 8.8 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.1%.

How to fix or mitigate CVE-2026-1618?

Within 24 hours: Inventory all FlexCity/Kiosk deployments and identify internet-facing instances; implement network segmentation to restrict access to affected systems. Within 7 days: Deploy compensating controls (WAF rules, access logging, IP whitelisting); contact Universal Software Inc. for patch timeline and interim security guidance. Within 30 days: Develop and execute a patch deployment plan immediately upon vendor release; consider temporary disable of non-critical Kiosk functionality if risk remains unacceptable.

Flexcity CVE-2026-1618

HIGH

Authentication Bypass Using an Alternate Path or Channel (CWE-288)

2026-02-13 iletisim@usom.gov.tr

Authentication Bypass Privilege Escalation Flexcity Uni Yaz

8.8

CVSS 3.1 · NVD

View

Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

Access

Authenticate as low-privilege user
Exploit

Discover alternate authentication path
Execution

Bypass privilege checks via alternate channel
Impact

Escalate to administrative access

Vulnerability Assessment

Weakness	CWE CWE-288 OWASP Top 10:2025 A07:2025 - Authentication Failures ASVS 5.0 V6 - Authentication Alternate path authentication
Exploitation Conditions	FlexCity/Kiosk versions 1.0 through 1.0.35 with authenticated user account. Requires valid credentials for any user role; vulnerability exists in alternate authentication path accessible after initial login.
Impact	CVSS 8.8 (HIGH). Attack vector: Network. Complexity: Low. Privileges required: Low. User interaction: None.
Exploit ScenarioDerived	An attacker could exploit this vulnerability to compromise the affected system.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).

No patch listed yet 0.1% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 12, 2026

Flexcity versions before 1.0.36 contain an authentication bypass vulnerability that allows authenticated users to escalate their privileges through an alternate access path. An attacker with valid credentials can exploit this flaw to gain unauthorized elevated access to the system. No patch is currently available.

Earlier versions of this analysis (1)

v1 Mar 12, 2026 - 22:02 CVSS 8.8

Authentication Bypass Using an Alternate Path or Channel vulnerability in Universal Software Inc. FlexCity/Kiosk allows Privilege Escalation.This issue affects FlexCity/Kiosk: from 1.0 before 1.0.36. [CVSS 8.8 HIGH]

RemediationAI

Monitor vendor advisories for a patch. Restrict network access to the affected service where possible.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

Affects Flexcity. Authentication Bypass Using an Alternate Path or Channel vulnerability in Universal Software Inc. FlexCity/Kiosk allows Privilege Escalation.This issue affects FlexCity/Kiosk: from 1.0 before 1.0.36.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 8.8 HIGH

AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

DescriptionCVE.org

Authentication Bypass Using an Alternate Path or Channel vulnerability in Universal Software Inc. FlexCity/Kiosk allows Privilege Escalation.This issue affects FlexCity/Kiosk: from 1.0 before 1.0.36.

Executive ViewAI

Why It Matters

A critical authentication bypass vulnerability in FlexCity/Kiosk (versions before 1.0.36) allows attackers to escalate privileges without valid credentials, potentially compromising sensitive systems and data. Organizations using this software face immediate risk of unauthorized access and account takeover, with no vendor patch currently available to remediate the issue.

Business Impact: High

Compensating Controls

Implement network segmentation to restrict FlexCity/Kiosk access; deploy WAF rules to block suspicious authentication requests; enable enhanced logging and monitoring for authentication attempts; restrict administrative access via IP whitelisting; disable remote access capabilities if not operationally critical; implement multi-factor authentication at network perimeter; monitor vendor security advisories for patch availability.

Threat Intelligence Overview

EPSS Score

0.1%

Top 81% exploitable

Data Quality

3 sources

Confidence: Low

NVD

CVE.org

EPSS

VulDB

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity HIGH

CISA KEV No

Public POC No

EPSS 0.1%

Patch available No

Active threat No

Deciding rule

HIGH severity (CVSS 7.0-8.9)

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived

Scheduled

Exploitation· derived

None

System Exposure· derived

Open

Automatable· derived

Human Impact

High

Priority Score

Low Medium High Critical

KEV: 0

EPSS: 0

CVSS: +44

PoC: 0

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Authentication Bypass CRITICAL

Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.

Privilege Escalation HIGH

Privilege escalation occurs when an attacker leverages flaws in access control mechanisms to gain permissions beyond what they were originally granted.