How severe is CVE-2021-25247?

CVE-2021-25247 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-25247 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-25247?

CVE-2021-25247 affects Trendmicro Housecall For Home Networks. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-25247?

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-2021-25247 published?

CVE-2021-25247 was published on 2021-01-27 and last updated on 2026-06-17.

CVE-2021-25247

CVE-2021-25247 is a high-severity vulnerability in Trendmicro Housecall For Home Networks 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-427.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 4.4
EPSS exploit prediction: 1% (50th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-427
Affected product: Trendmicro Housecall For Home Networks
Published: 2021-01-27
Last modified: 2026-06-17

Description

A DLL hijacking vulnerability Trend Micro HouseCall for Home Networks version 5.3.1063 and below could allow an attacker to use a malicious DLL to escalate privileges and perform arbitrary code execution. An attacker must already have user privileges on the machine to exploit this vulnerability.

Frequently asked questions

What is CVE-2021-25247?: A DLL hijacking vulnerability Trend Micro HouseCall for Home Networks version 5.3.1063 and below could allow an attacker to use a malicious DLL to escalate privileges and perform arbitrary code execution. An attacker must already have user privileges on the machine to exploit this vulnerability.
How severe is CVE-2021-25247?: CVE-2021-25247 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-25247 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-25247?: CVE-2021-25247 affects Trendmicro Housecall For Home Networks. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-25247?: 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-2021-25247 published?: CVE-2021-25247 was published on 2021-01-27 and last updated on 2026-06-17.

References

https://helpcenter.trendmicro.com/en-us/article/TMKA-10180

Affected products (1)

cpe:2.3:a:trendmicro:housecall_for_home_networks:5.3.0.1063:*:*:*:*:*:*:*

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