CVE-2019-11334: An authentication bypass in website post requests in the Tzumi Electronics Klic Lock application 1.0.9 for mob

This week

LOW 3.7REMOTEDOWNGRADEMITIGATE

CVE-2019-11334 is a low-severity flaw (CVSS 3.7) affecting klic lock, klic smart padlock model 5686 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An authentication bypass in website post requests in the Tzumi Electronics Klic Lock application 1.0.9 for mobile devices allows attackers to access resources (that are not otherwise accessible without proper authentication) via capture-replay. Physically proximate attackers can use this information to unlock unauthorized Tzumi Electronics Klic Smart Padlock Model 5686 Firmware 6.2.

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	3.7 (Low)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	1.6% (top 24%)
CISA exploited list	No
Weakness	CWE-294
Published	2019-06-11
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: tzumi

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

Am I affected?

Timeline

2019-06-11 18:29 UTCPublished CVE record published
2026-06-17 02:12 UTCUpdated Record last modified

tzumi klic lock DOWNGRADE

Affected: 1.0.9

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0.9

1. Check installed version

apt-cache policy klic-lock || rpm -q klic-lock || klic-lock --version

2. No fixed release: DOWNGRADE to a release before 1.0.9 (Debian / Ubuntu)

apt-cache madison klic-lock sudo apt install klic-lock=<VERSION_BEFORE_1.0.9> sudo apt-mark hold klic-lock

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

dnf --showduplicates list klic-lock sudo dnf downgrade klic-lock-<VERSION_BEFORE_1.0.9> sudo dnf versionlock add klic-lock

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.

tzumi klic smart padlock model 5686 firmware MITIGATE

Affected: 6.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 6.2

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

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-2019-11334?

klic lock: downgrade or apply the listed mitigation; klic smart padlock model 5686 firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2019-11334 being exploited?

CVE-2019-11334 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-2019-11334 affect?

CVE-2019-11334 affects klic lock, klic smart padlock model 5686 firmware. Severity is low (CVSS 3.7). An authentication bypass in website post requests in the Tzumi Electronics Klic Lock application 1.0.9 for mobile devices allows attackers to access resources (that are not otherwise accessible without proper authentication) via capture-rep

How urgent is CVE-2019-11334?

Priority 42/100. Public exploit reference; Remotely exploitable, no login, no user action

References

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