CVE-2026-4104Network attack vector

Unauthenticated authorization bypass via user-controlled SQL primary key

Published Jun 4, 2026 · Updated Jun 4, 2026

SQL injection in Akmer Bilişim TeknoPass 20210501 through 20260429 allows remote attackers to bypass database authorization. The published record identifies a user-controlled SQL primary key as the injection vector but does not disclose the affected endpoint, query, or unsafe operation. No authentication or user interaction is required; the record does not identify reachable records, database privileges, or exact consequences.

CVSS severity9.8
Critical
EPSS probability0.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SQL injection in Akmer Bilişim TeknoPass 20210501 through 20260429 allows remote attackers to bypass database authorization. The published record identifies a user-controlled SQL primary key as the injection vector but does not disclose the affected endpoint, query, or unsafe operation. No authentication or user interaction is required; the record does not identify reachable records, database privileges, or exact consequences.

The record

CVE
CVE-2026-4104
Published
Jun 4, 2026
Updated
Jun 4, 2026
Vendor
Akmer Bilişim
Product
TeknoPass
Classifications
CWE-89, CAPEC-66
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 4, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 4, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=20210501 <=20260429

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Akmer Bilişim · TeknoPassversion=20210501 <=20260429

Published CVSS scores

9.8TR-CERTCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-89Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
CAPEC-66SQL Injection

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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