A default username and password for an administrator account was discovered in ZKTeco…
Priority LOW 34CWE-521Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-521.
Summary
A default username and password for an administrator account was discovered in ZKTeco ZKTime 10.0 through 11.1.0, builds 20180901, 20190510.1, 20200309.3, 20200930, 20201231, and 20210220.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00566 47th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 8
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:zkteco:zktime:*:*:*:*:*:*:*:* | 10.0 – 11.1.0 | Vulnerable | ZKTeco |
| cpe:2.3:a:zkteco:zktime:11.1.0:-:*:*:*:*:*:* | 11.1.0 | Vulnerable | ZKTeco |
| cpe:2.3:a:zkteco:zktime:11.1.0:20180901:*:*:*:*:*:* | 11.1.0 20180901 | Vulnerable | ZKTeco |
| cpe:2.3:a:zkteco:zktime:11.1.0:20190510.1:*:*:*:*:*:* | 11.1.0 20190510.1 | Vulnerable | ZKTeco |
| cpe:2.3:a:zkteco:zktime:11.1.0:20200309.3:*:*:*:*:*:* | 11.1.0 20200309.3 | Vulnerable | ZKTeco |
| cpe:2.3:a:zkteco:zktime:11.1.0:20200930:*:*:*:*:*:* | 11.1.0 20200930 | Vulnerable | ZKTeco |
| cpe:2.3:a:zkteco:zktime:11.1.0:20201231:*:*:*:*:*:* | 11.1.0 20201231 | Vulnerable | ZKTeco |
| cpe:2.3:a:zkteco:zktime:11.1.0:20210220:*:*:*:*:*:* | 11.1.0 20210220 | Vulnerable | ZKTeco |
- cpe:2.3:a:zkteco:zktime:*:*:*:*:*:*:*:* Versions 10.0 – 11.1.0 Vulnerable ·ZKTeco
- cpe:2.3:a:zkteco:zktime:11.1.0:-:*:*:*:*:*:* Versions 11.1.0 Vulnerable ·ZKTeco
- cpe:2.3:a:zkteco:zktime:11.1.0:20180901:*:*:*:*:*:* Versions 11.1.0 20180901 Vulnerable ·ZKTeco
- cpe:2.3:a:zkteco:zktime:11.1.0:20190510.1:*:*:*:*:*:* Versions 11.1.0 20190510.1 Vulnerable ·ZKTeco
- cpe:2.3:a:zkteco:zktime:11.1.0:20200309.3:*:*:*:*:*:* Versions 11.1.0 20200309.3 Vulnerable ·ZKTeco
- cpe:2.3:a:zkteco:zktime:11.1.0:20200930:*:*:*:*:*:* Versions 11.1.0 20200930 Vulnerable ·ZKTeco
- cpe:2.3:a:zkteco:zktime:11.1.0:20201231:*:*:*:*:*:* Versions 11.1.0 20201231 Vulnerable ·ZKTeco
- cpe:2.3:a:zkteco:zktime:11.1.0:20210220:*:*:*:*:*:* Versions 11.1.0 20210220 Vulnerable ·ZKTeco
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-39434
- 2026-10-03 Alias added: GHSA-xq46-j345-hjrw
References
Sources
- CVE-2021-39434 · CVE Program
- CVE-2021-39434 · NVD
- FIRST EPSS
- GHSA-xq46-j345-hjrw · GitHub Advisory Database · CC BY 4.0
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