CVE-2016-20024 CRITICAL

CVE-2016-20024: ZKTeco ZKTime.Net 3.0.1.6 Insecure File Permissions Privilege Escalation

Vendor Zkteco Inc.
Product ZKTeco ZKTime.Net
Weakness CWE-538
Published March 15, 2026
Last update June 8, 2026

CVSS base score

9.3/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality
Integrity

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

What the vulnerability does

01Description

ZKTeco ZKTime.Net 3.0.1.6 contains an insecure file permissions vulnerability that allows unprivileged users to escalate privileges by modifying executable files. Attackers can exploit world-writable permissions on the ZKTimeNet3.0 directory and its contents to replace executable files with malicious binaries for privilege escalation.

Key dates

02Disclosure timeline

March 15, 2026 CVE published
June 8, 2026 Record updated