CVE-2024-36526: ZKTeco ZKBio CVSecurity v6.1.1 was discovered to contain a hardcoded cryptographic key.

This week

CRITICAL 9.8REMOTEDOWNGRADE

CVE-2024-36526 is a critical-severity flaw (CVSS 9.8) affecting zkbio cvsecurity. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

ZKTeco ZKBio CVSecurity v6.1.1 was discovered to contain a hardcoded cryptographic key.

Why this priority

Critical severity
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	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.9% (top 41%)
CISA exploited list	No
Weakness	CWE-259
Published	2024-07-09
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

2024-07-09 17:15 UTCPublished CVE record published
2026-06-17 07:36 UTCUpdated Record last modified

zkteco zkbio cvsecurity DOWNGRADE

Affected: 6.1.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 6.1.1

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 6.1.1 (Debian / Ubuntu)

apt-cache madison zkbio-cvsecurity sudo apt install zkbio-cvsecurity=<VERSION_BEFORE_6.1.1> 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_6.1.1> 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-2024-36526?

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

Is CVE-2024-36526 being exploited?

CVE-2024-36526 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-2024-36526 affect?

CVE-2024-36526 affects zkbio cvsecurity. Severity is critical (CVSS 9.8). ZKTeco ZKBio CVSecurity v6.1.1 was discovered to contain a hardcoded cryptographic key.

How urgent is CVE-2024-36526?

Priority 59/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2025-45746 MEDIUM 6.5 DOWNGRADE In ZKT ZKBio CVSecurity 6.4.1_R an unauthenticated attacker can craft JWT token using the hardcoded secret to
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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