How severe is CVE-2021-20674?

CVE-2021-20674 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-2021-20674 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (56th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-20674?

CVE-2021-20674 affects Ntt-tx Magicconnect. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-20674?

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-2021-20674 published?

CVE-2021-20674 was published on 2021-03-12 and last updated on 2026-06-17.

CVE-2021-20674

CVE-2021-20674 is a high-severity vulnerability in Ntt-tx Magicconnect 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: 6.8
EPSS exploit prediction: 1% (56th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-427
Affected product: Ntt-tx Magicconnect
Published: 2021-03-12
Last modified: 2026-06-17

Description

Untrusted search path vulnerability in Installer of MagicConnect Client program distributed before 2021 March 1 allows an attacker to gain privileges and via a Trojan horse DLL in an unspecified directory and to execute arbitrary code with the privilege of the user invoking the installer when a terminal is connected remotely using Remote desktop.

Frequently asked questions

What is CVE-2021-20674?: Untrusted search path vulnerability in Installer of MagicConnect Client program distributed before 2021 March 1 allows an attacker to gain privileges and via a Trojan horse DLL in an unspecified directory and to execute arbitrary code with the privilege of the user invoking the installer when a terminal is connected remotely using Remote desktop.
How severe is CVE-2021-20674?: CVE-2021-20674 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-2021-20674 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (56th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-20674?: CVE-2021-20674 affects Ntt-tx Magicconnect. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-20674?: 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-2021-20674 published?: CVE-2021-20674 was published on 2021-03-12 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:ntt-tx:magicconnect:*:*:*:*:*:*:*:*

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