CVE-2019-12328: A command injection (missing input validation) issue in the remote phonebook configuration URI in the web inte

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CRITICAL 9.0MITIGATE

CVE-2019-12328 is a critical-severity flaw (CVSS 9.0) affecting a10w firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A command injection (missing input validation) issue in the remote phonebook configuration URI in the web interface of the Atcom A10W VoIP phone with firmware 2.6.1a2421 allows an authenticated remote attacker in the same network to trigger OS commands via shell metacharacters in a POST request.

Why this priority

Critical severity
EPSS top 9%: very likely to be exploited
Public exploit reference

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

Risk facts

CVSS score	9.0 (Critical)
Attack vector	Adjacent network
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	4.2% (top 9%)
CISA exploited list	No
Weakness	CWE-78
Published	2019-07-22
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: atcom

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

Am I affected?

Timeline

2019-07-22 18:15 UTCPublished CVE record published
2026-06-17 02:14 UTCUpdated Record last modified

atcom a10w firmware MITIGATE

Affected: 2.6.1a2421

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.6.1a2421

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-2019-12328?

a10w firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2019-12328 being exploited?

CVE-2019-12328 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-2019-12328 affect?

CVE-2019-12328 affects a10w firmware. Severity is critical (CVSS 9.0). A command injection (missing input validation) issue in the remote phonebook configuration URI in the web interface of the Atcom A10W VoIP phone with firmware 2.6.1a2421 allows an authenticated remote attacker in the same network to trigger

How urgent is CVE-2019-12328?

Priority 59/100. Critical severity; EPSS top 9%: very likely to be exploited; Public exploit reference

References

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