CVE-2025-45746: In ZKT ZKBio CVSecurity 6.4.1_R an unauthenticated attacker can craft JWT token using the hardcoded secret to

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MEDIUM 6.5REMOTEDOWNGRADE

CVE-2025-45746 is a medium-severity flaw (CVSS 6.5) affecting zkbio cvsecurity. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In ZKT ZKBio CVSecurity 6.4.1_R an unauthenticated attacker can craft JWT token using the hardcoded secret to authenticate to the service console. NOTE: the Supplier disputes the significance of this report because the service console is typically only accessible from a local area network, and because access to the service console does not result in login access or data access in the context of the application software platform.

Why this priority

Public exploit reference
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 70%)
CISA exploited list	No
Weakness	CWE-321, CWE-798
Published	2025-05-13
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: zkteco

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-05-13 19:15 UTCPublished CVE record published
2026-06-17 09:25 UTCUpdated Record last modified

zkteco zkbio cvsecurity DOWNGRADE

Affected: 6.4.1_r

Fixed in: no fixed release known

Safe to downgrade to: a release before 6.4.1_r

1. Check installed version

apt-cache policy zkbio-cvsecurity || rpm -q zkbio-cvsecurity || zkbio-cvsecurity --version

2. No fixed release: DOWNGRADE to a release before 6.4.1_r (Debian / Ubuntu)

apt-cache madison zkbio-cvsecurity sudo apt install zkbio-cvsecurity=<VERSION_BEFORE_6.4.1_r> sudo apt-mark hold zkbio-cvsecurity

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list zkbio-cvsecurity sudo dnf downgrade zkbio-cvsecurity-<VERSION_BEFORE_6.4.1_r> sudo dnf versionlock add zkbio-cvsecurity

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-45746?

zkbio cvsecurity: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2025-45746 being exploited?

CVE-2025-45746 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-45746 affect?

CVE-2025-45746 affects zkbio cvsecurity. Severity is medium (CVSS 6.5). In ZKT ZKBio CVSecurity 6.4.1_R an unauthenticated attacker can craft JWT token using the hardcoded secret to authenticate to the service console. NOTE: the Supplier disputes the significance of this report because the service console is ty

How urgent is CVE-2025-45746?

Priority 40/100. Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2024-36526 CRITICAL 9.8 DOWNGRADE ZKTeco ZKBio CVSecurity v6.1.1 was discovered to contain a hardcoded cryptographic key.
CVE-2024-35433 HIGH 8.1 DOWNGRADE ZKTeco ZKBio CVSecurity 6.1.1 is vulnerable to Incorrect Access Control
CVE-2024-35432 MEDIUM 6.1 DOWNGRADE ZKTeco ZKBio CVSecurity 6.1.1 is vulnerable to Cross Site Scripting (XSS) via an Audio File
CVE-2024-35431 HIGH 7.5 DOWNGRADE ZKTeco ZKBio CVSecurity 6.1.1 is vulnerable to Directory Traversal via photoBase64
CVE-2024-35430 HIGH 8.1 DOWNGRADE In ZKTeco ZKBio CVSecurity v6.1.1_R and earlier (fixed in 6.1.3_R) an authenticated user can bypass password c

References

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