How severe is CVE-2021-38432?

CVE-2021-38432 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-2021-38432 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-38432?

CVE-2021-38432 affects Fatek Communication Server Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-38432?

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-2021-38432 published?

CVE-2021-38432 was published on 2021-10-15 and last updated on 2026-06-17.

CVE-2021-38432

CVE-2021-38432 is a critical-severity vulnerability in Fatek Communication Server 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-121.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 2% (75th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-121
Affected product: Fatek Communication Server Firmware
Published: 2021-10-15
Last modified: 2026-06-17

Description

FATEK Automation Communication Server Versions 1.13 and prior lacks proper validation of user-supplied data, which could result in a stack-based buffer overflow condition and allow an attacker to remotely execute code.

Frequently asked questions

What is CVE-2021-38432?: FATEK Automation Communication Server Versions 1.13 and prior lacks proper validation of user-supplied data, which could result in a stack-based buffer overflow condition and allow an attacker to remotely execute code.
How severe is CVE-2021-38432?: CVE-2021-38432 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-2021-38432 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-38432?: CVE-2021-38432 affects Fatek Communication Server Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-38432?: 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-2021-38432 published?: CVE-2021-38432 was published on 2021-10-15 and last updated on 2026-06-17.

References

https://us-cert.cisa.gov/ics/advisories/icsa-21-280-07

Affected products (1)

cpe:2.3:o:fatek:communication_server_firmware:*:*:*:*:*:*:*:*

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