CVE-2018-9162: Contec Smart Home 4.15 devices do not require authentication for new_user.php, edit_user.php, delete_user.php,

This week

CRITICAL 9.8REMOTEMITIGATE

CVE-2018-9162 is a critical-severity flaw (CVSS 9.8) affecting smart home firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Contec Smart Home 4.15 devices do not require authentication for new_user.php, edit_user.php, delete_user.php, and user.php, as demonstrated by changing the admin password and then obtaining control over doors.

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	2.2% (top 17%)
CISA exploited list	No
Weakness	CWE-306
Published	2018-03-31
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: contec-touch

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

Am I affected?

Timeline

2018-03-31 22:29 UTCPublished CVE record published
2026-06-17 02:06 UTCUpdated Record last modified

contec-touch smart home firmware MITIGATE

Affected: 4.15

Fixed in: no fixed release known

Safe to downgrade to: a release before 4.15

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-2018-9162?

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

Is CVE-2018-9162 being exploited?

CVE-2018-9162 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-2018-9162 affect?

CVE-2018-9162 affects smart home firmware. Severity is critical (CVSS 9.8). Contec Smart Home 4.15 devices do not require authentication for new_user.php, edit_user.php, delete_user.php, and user.php, as demonstrated by changing the admin password and then obtaining control over doors.

How urgent is CVE-2018-9162?

Priority 65/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

PHP vulnerabilities

References

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