How severe is CVE-2019-3984?

CVE-2019-3984 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2019-3984 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (89th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-3984?

CVE-2019-3984 affects Amazon Blink Xt2 Sync Module Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-3984?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2019-3984 published?

CVE-2019-3984 was published on 2019-12-31 and last updated on 2026-06-17.

CVE-2019-3984

CVE-2019-3984 is a critical-severity vulnerability in Amazon Blink Xt2 Sync Module Firmware with a CVSS 3.x base score of 9.8. 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-78.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 10.0
EPSS exploit prediction: 4% (89th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-78
Affected product: Amazon Blink Xt2 Sync Module Firmware
Published: 2019-12-31
Last modified: 2026-06-17

Description

Blink XT2 Sync Module firmware prior to 2.13.11 allows remote attackers to execute arbitrary commands on the device due to improperly sanitized input when the device retrieves updates scripts from the internet.

Frequently asked questions

What is CVE-2019-3984?: Blink XT2 Sync Module firmware prior to 2.13.11 allows remote attackers to execute arbitrary commands on the device due to improperly sanitized input when the device retrieves updates scripts from the internet.
How severe is CVE-2019-3984?: CVE-2019-3984 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2019-3984 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (89th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-3984?: CVE-2019-3984 affects Amazon Blink Xt2 Sync Module Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-3984?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2019-3984 published?: CVE-2019-3984 was published on 2019-12-31 and last updated on 2026-06-17.

References

https://www.tenable.com/security/research/tra-2019-51

Affected products (1)

cpe:2.3:o:amazon:blink_xt2_sync_module_firmware:*:*:*:*:*:*:*:*

More vulnerabilities in Amazon Blink Xt2 Sync Module Firmware

CVE-2019-3989 — Critical (CVSS 9.8): Blink XT2 Sync Module firmware prior to 2.13.11 allows remote attackers to execute arbitrary commands on the device due…
CVE-2019-3988 — High (CVSS 8.8): Blink XT2 Sync Module firmware prior to 2.13.11 allows remote attackers to execute arbitrary commands on the device due…
CVE-2019-3987 — High (CVSS 8.8): Blink XT2 Sync Module firmware prior to 2.13.11 allows remote attackers to execute arbitrary commands on the device due…
CVE-2019-3986 — High (CVSS 8.8): Blink XT2 Sync Module firmware prior to 2.13.11 allows remote attackers to execute arbitrary commands on the device due…
CVE-2019-3985 — High (CVSS 8.8): Blink XT2 Sync Module firmware prior to 2.13.11 allows remote attackers to execute arbitrary commands on the device due…
CVE-2019-3983 — Medium (CVSS 6.8): Blink XT2 Sync Module firmware prior to 2.13.11 allows remote attackers to execute arbitrary code and commands on the…

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