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CVE-2016-20024

33
FAUCET Score

CVE-2016-20024 identifies an insecure file permissions vulnerability in ZKTeco ZKTime.Net 3.0.1.6, enabling unprivileged users to escalate privileges. Attackers can exploit world-writable permissions on the ZKTimeNet3.0 directory to replace executable files with malicious binaries. This vulnerability carries a Critical CVSS score of 9.8, indicating a severe impact on confidentiality, integrity, and availability with low attack complexity, potentially exploitable over a network. Despite its critical severity, there is currently no evidence of active exploitation, public exploit code, or significant community attention for this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
ZKTeco Inc.ZKTeco ZKTime.Net
3.0.1.1 (160216), 3.0.1.5 (160622), 3.0.1.6CNA affected

CVSS Data

CVSS version used by this source: 4.0

9.3CRITICAL

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
VS Confidentiality
HIGH
VS Integrity
HIGH
VS Availability
HIGH
SS Confidentiality
NONE
SS Integrity
NONE
SS Availability
NONE
Exploit Maturity
NOT_DEFINED
CvssVersion
4.0

Exploit Intelligence

EPSS Score
0.73%
Probability of exploitation in next 30 days
EPSS Percentile
50.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0073 is in the 33rd percentile among its peer group of 36,835 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

cxsecurity.com / issue/WLB-2016080264
exchange.xforce.ibmcloud.com / vulnerabilities/116487
packetstormsecurity.com / files/138565
exploit-db.com / exploits/40322
vulncheck.com / advisories/zkteco-zktime-net-insecure-file-permissions-privilege-escalation
zeroscience.mk / en/vulnerabilities/ZSL-2016-5360.php