CVE-2016-20028Public exploitNetwork attack vector

Superadmin account creation via unverified cross-origin request

Published Mar 15, 2026 · Updated Mar 15, 2026

Cross-site request forgery in ZKTeco ZKBioSecurity 3.0.1.0_R_230 allows remote attackers to create superadmin accounts via crafted requests. The authUserAction!edit.action endpoint accepts a multipart POST that sets authUser.isSuperuser=true without verifying the request's origin or authenticity. Exploitation requires a logged-in administrator's browser to visit an attacker-controlled page, after which the new account grants unauthorized administrative access.

CVSS severity4.3
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site request forgery in ZKTeco ZKBioSecurity 3.0.1.0_R_230 allows remote attackers to create superadmin accounts via crafted requests. The authUserAction!edit.action endpoint accepts a multipart POST that sets authUser.isSuperuser=true without verifying the request's origin or authenticity. Exploitation requires a logged-in administrator's browser to visit an attacker-controlled page, after which the new account grants unauthorized administrative access.

The record

CVE
CVE-2016-20028
Published
Mar 15, 2026
Updated
Mar 15, 2026
Vendor
ZKTeco
Product
ZKBioSecurity
Classifications
CWE-352, T1136
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 15, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=3.0.1.0_R_230

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

ZKTeco · ZKBioSecurityversion=3.0.1.0_R_230

Published CVSS scores

4.3VulnCheckCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
5.3VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:L/SI:L/SA:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-352Cross-Site Request Forgery (CSRF)
T1136Create Account

Public exploit references

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Technologies

Your stack

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Your stack

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