Vulnerability in Zkteco Inc. Zkaccess Professional
CVE-2016-20025
ZKTeco ZKAccess Professional 3.5.3 contains an insecure file permissions vulnerability that allows authenticated users to escalate privileges by modifying executable files. Attackers can leverage the Modify permission granted to the Authenticated Users group to replace executable binaries with malicious code for privilege escalation.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.004 (36.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 36th percentile — 36.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Zkteco Inc. Zkaccess Professional — versions 3.5.3 (Build 0005)
Weakness classification (CWE)
References
- www.zeroscience.mk/en/vulnerabilities/ZSL-2016-5361.php (third-party-advisory)
- cxsecurity.com/issue/WLB-2016080265 (third-party-advisory)
- exchange.xforce.ibmcloud.com/vulnerabilities/116486 (vdb-entry)
- packetstormsecurity.com/files/138566 (exploit)
- www.exploit-db.com/exploits/40323/ (exploit)
- www.vulncheck.com/advisories/zkteco-zkaccess-professional-privilege-escalation-… (third-party-advisory)
Frequently asked questions
- What is CVE-2016-20025?
- CVE-2016-20025 is a high-severity vulnerability in Zkteco Inc. Zkaccess Professional, classified under Files or Directories Accessible to External Parties. CVSS score: 8.8/10. Published 2026-03-16.
- How severe is CVE-2016-20025?
- High severity. CVSS v3 base score is 8.8 out of 10.