Information disclosure in Zkteco Inc. Zktime.net
CVE-2016-20024
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.007 (52.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 53rd percentile — 52.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000
Affected products
- Zkteco Inc. Zktime.net — versions 3.0.1.6, 3.0.1.1 (160216), 3.0.1.5 (160622)
Weakness classification (CWE)
References
- Zero Science Lab Disclosure (third-party-advisory)
- CXSecurity (third-party-advisory)
- IBM X-Force Exchange (vdb-entry)
- Packet Storm Security (exploit)
- Reference (exploit)
- VulnCheck Advisory: ZKTeco ZKTime.Net 3.0.1.6 Insecure File Permissions Privilege Escalation (third-party-advisory)
Frequently asked questions
- What is CVE-2016-20024?
- CVE-2016-20024 is a critical-severity vulnerability in Zkteco Inc. Zktime.net, classified under Insertion of Sensitive Information into Externally-Accessible File or Directory. CVSS score: 9.8/10. Published 2026-03-16.
- How severe is CVE-2016-20024?
- Critical severity. CVSS v3 base score is 9.8 out of 10.