CVE-2016-20024 PUBLISHED

ZKTeco ZKTime.Net 3.0.1.6 Insecure File Permissions Privilege Escalation

Assigner: VulnCheck
Reserved: 15.03.2026 Published: 15.03.2026 Updated: 15.03.2026

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.

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
CVSS Score: 9.3

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	High	Confidentiality	None
Attack Complexity	Low	Integrity	High	Integrity	None
Attack Requirements	None	Availability	High	Availability	None
Privileges Required	None
User Interaction	None

CVSS 4.0

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	ZKTeco Inc.
Product	ZKTeco ZKTime.Net
Versions	Version 3.0.1.6 is affected Version 3.0.1.5 (160622) is affected Version 3.0.1.1 (160216) is affected

Credits

LiquidWorm as Gjoko Krstic of Zero Science Lab finder

References

Problem Types

Insertion of Sensitive Information into Externally-Accessible File or Directory CWE