What is CVE-2021-20674?

CVE-2021-20674 is a high-severity vulnerability in Ntt Technocross Corporation Installer Of Magicconnect Client Program, classified under Uncontrolled Search Path Element. CVSS score: 7.8/10. Published 2021-03-12.

How severe is CVE-2021-20674?

High severity. CVSS v3 base score is 7.8 out of 10.

Vulnerability in Ntt Technocross Corporation Installer Of Magicconnect Client Program

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.

Published 2021-03-12 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.009 (58.7th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 59th percentile — 58.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

Ntt Technocross Corporation Installer Of Magicconnect Client Program — versions distributed before 2021 March 1
Ntt-Tx Magicconnect

Weakness classification (CWE)

CWE-427 — Uncontrolled Search Path Element

References

www.magicconnect.net/information/202103110900-2 (Vendor Advisory)
jvn.jp/en/jp/JVN18056666/index.html (Third Party Advisory)

Frequently asked questions

What is CVE-2021-20674?: CVE-2021-20674 is a high-severity vulnerability in Ntt Technocross Corporation Installer Of Magicconnect Client Program, classified under Uncontrolled Search Path Element. CVSS score: 7.8/10. Published 2021-03-12.
How severe is CVE-2021-20674?: High severity. CVSS v3 base score is 7.8 out of 10.