How severe is CVE-2020-3924?

CVE-2020-3924 has a CVSS 3.x base score of 6.4, rated medium severity. It is exploitable over network with high attack complexity, requires high privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-3924 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-3924?

CVE-2020-3924 primarily affects Tonnet Tat-77104g1 Firmware. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-3924?

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

When was CVE-2020-3924 published?

CVE-2020-3924 was published on 2020-02-27 and last updated on 2026-06-17.

CVE-2020-3924

CVE-2020-3924 is a medium-severity vulnerability in Tonnet Tat-77104g1 Firmware with a CVSS 3.x base score of 6.4. 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-77.

Key facts

Severity: Medium (CVSS 3.x base score 6.4)
CVSS v2: 10.0
EPSS exploit prediction: 1% (66th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-77
Affected product: Tonnet Tat-77104g1 Firmware
Published: 2020-02-27
Last modified: 2026-06-17

Description

DVR firmware in TAT-76 and TAT-77 series of products, provided by TONNET do not properly verify patch files. Attackers can inject a specific command into a patch file and gain access to the system.

Frequently asked questions

What is CVE-2020-3924?: DVR firmware in TAT-76 and TAT-77 series of products, provided by TONNET do not properly verify patch files. Attackers can inject a specific command into a patch file and gain access to the system.
How severe is CVE-2020-3924?: CVE-2020-3924 has a CVSS 3.x base score of 6.4, rated medium severity. It is exploitable over network with high attack complexity, requires high privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-3924 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-3924?: CVE-2020-3924 primarily affects Tonnet Tat-77104g1 Firmware. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-3924?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-3924 published?: CVE-2020-3924 was published on 2020-02-27 and last updated on 2026-06-17.

References

Affected products (8)

cpe:2.3:o:tonnet:tat-77104g1_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:tonnet:tat-70432n_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:tonnet:tat-71416g1_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:tonnet:tat-71832g1_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:tonnet:tat-76104g3_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:tonnet:tat-76108g3_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:tonnet:tat-76116g3_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:tonnet:tat-76132g3_firmware:*:*:*:*:*:*:*:*

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