CVE-2017-16778: An access control weakness in the DTMF tone receiver of Fermax Outdoor Panel allows physical attackers to inje

Routine

MEDIUM 4.6MITIGATE

CVE-2017-16778 is a medium-severity flaw (CVSS 4.6) affecting outdoor panel firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An access control weakness in the DTMF tone receiver of Fermax Outdoor Panel allows physical attackers to inject a Dual-Tone-Multi-Frequency (DTMF) tone to invoke an access grant that would allow physical access to a restricted floor/level. By design, only a residential unit owner may allow such an access grant. However, due to incorrect access control, an attacker could inject it via the speaker unit to perform an access grant to gain unauthoriz

Why this priority

No elevated risk signals yet

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

Risk facts

CVSS score	4.6 (Medium)
Attack vector	Physical
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.6% (top 54%)
CISA exploited list	No
Weakness	CWE-863
Published	2019-12-24
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: fermax

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

Am I affected?

Timeline

2019-12-24 14:15 UTCPublished CVE record published
2026-06-17 01:09 UTCUpdated Record last modified

fermax outdoor panel firmware MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

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-2017-16778?

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

Is CVE-2017-16778 being exploited?

CVE-2017-16778 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-2017-16778 affect?

CVE-2017-16778 affects outdoor panel firmware. Severity is medium (CVSS 4.6). An access control weakness in the DTMF tone receiver of Fermax Outdoor Panel allows physical attackers to inject a Dual-Tone-Multi-Frequency (DTMF) tone to invoke an access grant that would allow physical access to a restricted floor/level.

How urgent is CVE-2017-16778?

Priority 28/100. No elevated risk signals yet.

References

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