How severe is CVE-2017-16778?

CVE-2017-16778 has a CVSS 3.x base score of 4.6, rated medium severity. It is exploitable over physical access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2017-16778 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (42nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-16778?

CVE-2017-16778 affects Fermax Outdoor Panel Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2017-16778?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2017-16778 published?

CVE-2017-16778 was published on 2019-12-24 and last updated on 2026-06-17.

CVE-2017-16778

CVE-2017-16778 is a medium-severity vulnerability in Fermax Outdoor Panel Firmware with a CVSS 3.x base score of 4.6. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-863.

Key facts

Severity: Medium (CVSS 3.x base score 4.6)
CVSS v2: 2.1
EPSS exploit prediction: 1% (42nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-863
Affected product: Fermax Outdoor Panel Firmware
Published: 2019-12-24
Last modified: 2026-06-17

Description

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 unauthorized access, as demonstrated by a loud DTMF tone representing '1' and a long '#' (697 Hz and 1209 Hz, followed by 941 Hz and 1477 Hz).

Frequently asked questions

What is CVE-2017-16778?: 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 unauthorized access, as demonstrated by a loud DTMF tone representing '1' and a long '#' (697 Hz and 1209 Hz, followed by 941 Hz and 1477 Hz).
How severe is CVE-2017-16778?: CVE-2017-16778 has a CVSS 3.x base score of 4.6, rated medium severity. It is exploitable over physical access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2017-16778 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (42nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-16778?: CVE-2017-16778 affects Fermax Outdoor Panel Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2017-16778?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2017-16778 published?: CVE-2017-16778 was published on 2019-12-24 and last updated on 2026-06-17.

References

https://github.com/breaktoprotect/CVE-2017-16778-Intercom-DTMF-Injection

Affected products (1)

cpe:2.3:o:fermax:outdoor_panel_firmware:-:*:*:*:*:*:*:*

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