CVE-2019-16243: On TCL Alcatel Cingular Flip 2 B9HUAH1 devices, there is an undocumented web API that allows unprivileged Java

This month

MEDIUM 6.1MITIGATE

CVE-2019-16243 is a medium-severity flaw (CVSS 6.1) affecting cingular flip 2 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

On TCL Alcatel Cingular Flip 2 B9HUAH1 devices, there is an undocumented web API that allows unprivileged JavaScript, including JavaScript running within the KaiOS browser, to view and edit the device's firmware over-the-air update settings. (This web API is normally used by the system application to trigger firmware updates via OmaService.js.)

Why this priority

Public exploit reference

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

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.7% (top 45%)
CISA exploited list	No
Weakness	CWE-306
Published	2019-11-26
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: alcatelmobile

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

Am I affected?

Timeline

2019-11-26 16:15 UTCPublished CVE record published
2026-06-17 02:21 UTCUpdated Record last modified

alcatelmobile cingular flip 2 firmware MITIGATE

Affected: b9huah1

Fixed in: no fixed release known

Safe to downgrade to: a release before b9huah1

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-2019-16243?

cingular flip 2 firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2019-16243 being exploited?

CVE-2019-16243 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-2019-16243 affect?

CVE-2019-16243 affects cingular flip 2 firmware. Severity is medium (CVSS 6.1). On TCL Alcatel Cingular Flip 2 B9HUAH1 devices, there is an undocumented web API that allows unprivileged JavaScript, including JavaScript running within the KaiOS browser, to view and edit the device's firmware over-the-air update settings

How urgent is CVE-2019-16243?

Priority 40/100. Public exploit reference

Software pages

Java vulnerabilities

Related CVEs

CVE-2019-16242 MEDIUM 6.8 MITIGATE On TCL Alcatel Cingular Flip 2 B9HUAH1 devices, there is an engineering application named omamock that is vuln
CVE-2019-16241 MEDIUM 6.8 MITIGATE On TCL Alcatel Cingular Flip 2 B9HUAH1 devices, PIN authentication can be bypassed by creating a special file

References

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