How severe is CVE-2021-25251?

CVE-2021-25251 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-25251 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-25251?

CVE-2021-25251 primarily affects Trendmicro Antivirus+ Security 2020. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-25251?

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-2021-25251 published?

CVE-2021-25251 was published on 2021-02-10 and last updated on 2026-06-17.

CVE-2021-25251

CVE-2021-25251 is a high-severity vulnerability in Trendmicro Antivirus+ Security 2020 with a CVSS 3.x base score of 7.2. 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-94.

Key facts

Severity: High (CVSS 3.x base score 7.2)
CVSS v2: 6.5
EPSS exploit prediction: 2% (83rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-94
Affected product: Trendmicro Antivirus+ Security 2020
Published: 2021-02-10
Last modified: 2026-06-17

Description

The Trend Micro Security 2020 and 2021 families of consumer products are vulnerable to a code injection vulnerability which could allow an attacker to disable the program's password protection and disable protection. An attacker must already have administrator privileges on the machine to exploit this vulnerability.

Frequently asked questions

What is CVE-2021-25251?: The Trend Micro Security 2020 and 2021 families of consumer products are vulnerable to a code injection vulnerability which could allow an attacker to disable the program's password protection and disable protection. An attacker must already have administrator privileges on the machine to exploit this vulnerability.
How severe is CVE-2021-25251?: CVE-2021-25251 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-25251 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-25251?: CVE-2021-25251 primarily affects Trendmicro Antivirus+ Security 2020. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-25251?: 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-2021-25251 published?: CVE-2021-25251 was published on 2021-02-10 and last updated on 2026-06-17.

References

https://helpcenter.trendmicro.com/en-us/article/TMKA-10211

Affected products (8)

cpe:2.3:a:trendmicro:antivirus\+_security_2020:16.0:*:*:*:*:*:*:*
cpe:2.3:a:trendmicro:antivirus\+_security_2021:17.0:*:*:*:*:*:*:*
cpe:2.3:a:trendmicro:internet_security_2020:16.0:*:*:*:*:*:*:*
cpe:2.3:a:trendmicro:internet_security_2021:17.0:*:*:*:*:*:*:*
cpe:2.3:a:trendmicro:maximum_security_2020:16.0:*:*:*:*:*:*:*
cpe:2.3:a:trendmicro:maximum_security_2021:17.0:*:*:*:*:*:*:*
cpe:2.3:a:trendmicro:premium_security_2020:16.0:*:*:*:*:*:*:*
cpe:2.3:a:trendmicro:premium_security_2021:17.0:*:*:*:*:*:*:*

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