CVE-2026-18808 PUBLISHED

Unauthenticated Remote Code Execution via Code Injection in Klemsan's KIO

Assigner: TR-CERT
Reserved: 04.08.2026 Published: 01.09.2026 Updated: 01.09.2026

Improper Control of Generation of Code ('Code Injection') vulnerability in Klemsan Electrical Electronics Inc. KIO (Klemsan Internet Objects) allows Code Injection.

This issue affects KIO (Klemsan Internet Objects): before v1.9.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS Score: 9.8

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	High
Privileges Required	None	Integrity Impact	High
User Interaction	None	Availability Impact	High

CVSS 3.1

Product Status

Vendor	Klemsan Electrical Electronics Inc.
Product	KIO (Klemsan Internet Objects)
Versions	Default: unaffected affected from 0 to v1.9 (excl.)

Credits

Yemliha İPEK finder

References

https://siberguvenlik.gov.tr/guvenlik-bildirimleri/detay/tr-26-0963

Problem Types

CWE-94 Improper Control of Generation of Code ('Code Injection') CWE

Impacts

CAPEC-242 Code Injection