How severe is CVE-2021-32458?

CVE-2021-32458 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-32458 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-32458?

CVE-2021-32458 primarily affects Trendmicro Home Network Security. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-32458?

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

When was CVE-2021-32458 published?

CVE-2021-32458 was published on 2021-05-27 and last updated on 2026-06-17.

CVE-2021-32458

CVE-2021-32458 is a high-severity vulnerability in Trendmicro Home Network Security with a CVSS 3.x base score of 7.8. 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-787.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 7.2
EPSS exploit prediction: 0% (31st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-787
Affected product: Trendmicro Home Network Security
Published: 2021-05-27
Last modified: 2026-06-17

Description

Trend Micro Home Network Security version 6.6.604 and earlier is vulnerable to an iotcl stack-based buffer overflow vulnerability which could allow an attacker to issue a specially crafted iotcl which could lead to code execution on affected devices. An attacker must first obtain the ability to execute low-privileged code on the target device in order to exploit this vulnerability.

Frequently asked questions

What is CVE-2021-32458?: Trend Micro Home Network Security version 6.6.604 and earlier is vulnerable to an iotcl stack-based buffer overflow vulnerability which could allow an attacker to issue a specially crafted iotcl which could lead to code execution on affected devices. An attacker must first obtain the ability to execute low-privileged code on the target device in order to exploit this vulnerability.
How severe is CVE-2021-32458?: CVE-2021-32458 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-32458 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-32458?: CVE-2021-32458 primarily affects Trendmicro Home Network Security. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-32458?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-32458 published?: CVE-2021-32458 was published on 2021-05-27 and last updated on 2026-06-17.

References

Affected products (3)

cpe:2.3:a:trendmicro:home_network_security:*:*:*:en:*:*:*:*
cpe:2.3:a:trendmicro:home_network_security:*:*:*:ja:*:*:*:*
cpe:2.3:a:trendmicro:home_network_security:*:*:*:zh:*:*:*:*

More vulnerabilities in Trendmicro Home Network Security

CVE-2021-32457 — High (CVSS 7.8): Trend Micro Home Network Security version 6.6.604 and earlier is vulnerable to an iotcl stack-based buffer overflow…
CVE-2021-31518 — High (CVSS 7.5): Trend Micro Home Network Security 6.5.599 and earlier is vulnerable to a file-parsing vulnerability which could allow…
CVE-2021-31517 — High (CVSS 7.5): Trend Micro Home Network Security 6.5.599 and earlier is vulnerable to a file-parsing vulnerability which could allow…
CVE-2021-32459 — Medium (CVSS 6.5): Trend Micro Home Network Security version 6.6.604 and earlier contains a hard-coded password vulnerability in the log…

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