ZKTeco ZKBioSecurity 3.0 User Enumeration via authLoginAction
Published Mar 15, 2026
9.3
CRITICALCVSS 4.0
EPSS 0.56%
Description
ZKTeco ZKBioSecurity 3.0 contains a user enumeration vulnerability that allows unauthenticated attackers to discover valid usernames by submitting partial characters via the username parameter. Attackers can send requests to the authLoginAction!login.do script with varying username inputs to enumerate valid user accounts based on application responses.
Affected products
-
- Version 3.0.1.0_R_230StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| ZKTeco Inc. | ZKTeco ZKBioSecurity | n/a |
|
No data.
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
Vendor solution
The affected software ZKBioSecurity and ZKAccess have been officially discontinued. It is recommended that users switch to using ZKBio CVSecurity software. ZKBio CVSecurity has fixed these vulnerabilities. It is recommended that customers use the latest version of ZKBio CVSecurity to eliminate risks.
Metrics
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
1 other source (NVD) ▾
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
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
PoCAutomatable
YesTechnical Impact
PartialDecision
n/aAssessed Mar 16, 2026 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
Mar–Oct 2026- EPSS v4
- EPSS v5
Percentile over time
- EPSS v4
- EPSS v5
Table of values (3 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.56% (0.00563) | 44.77th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.56% (0.00563) | 42.14th | v5 (v2026.06.15) |
| Mar 16, 2026 | 0.06% (0.00056) | 17.38th | v4 (v2025.03.14) |
References (4)
- https://exchange.xforce.ibmcloud.com/vulnerabilities/116485 vdb-entry
- https://packetstormsecurity.com/files/138573 exploit
- https://www.vulncheck.com/advisories/zkteco-zkbiosecurity-user-enumeration-via-authloginaction third-party-advisory
- https://www.zeroscience.mk/en/vulnerabilities/ZSL-2016-5366.php third-party-advisory
| Link | Providers | Tags |
|---|---|---|
| https://exchange.xforce.ibmcloud.com/vulnerabilities/116485 | vdb-entry | |
| https://packetstormsecurity.com/files/138573 | exploit | |
| https://www.vulncheck.com/advisories/zkteco-zkbiosecurity-user-enumeration-via-authloginaction | third-party-advisory | |
| https://www.zeroscience.mk/en/vulnerabilities/ZSL-2016-5366.php | third-party-advisory |
Change history (0)
No recorded changes yet.