CVE-2021-20674: Untrusted search path vulnerability in Installer of MagicConnect Client program distributed before 2021 March

Q: How do I fix CVE-2021-20674?

magicconnect: upgrade to 2021-03-01. Exact commands for each OS are on this page.

Q: Is CVE-2021-20674 being exploited?

CVE-2021-20674 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2021-20674 affect?

CVE-2021-20674 affects magicconnect. Severity is high (CVSS 7.8). 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

This month

HIGH 7.8UPGRADE

CVE-2021-20674 is a high-severity flaw (CVSS 7.8) affecting magicconnect. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.9% (top 39%)
CISA exploited list	No
Weakness	CWE-427
Published	2021-03-12
Last modified	2026-06-17

Publisher (CNA): JPCERT/CC · Vendor: ntt-tx

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2021-03-12 02:15 UTCPublished CVE record published
2026-06-17 03:34 UTCUpdated Record last modified

ntt-tx magicconnect UPGRADE

Affected: < 2021-03-01

Fixed in: 2021-03-01

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy magicconnect || rpm -q magicconnect || magicconnect --version

2. UPGRADE to 2021-03-01 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade magicconnect

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade magicconnect

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2021-20674?

magicconnect: upgrade to 2021-03-01. Exact commands for each OS are on this page.

Is CVE-2021-20674 being exploited?

CVE-2021-20674 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2021-20674 affect?

CVE-2021-20674 affects magicconnect. Severity is high (CVSS 7.8). 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

How urgent is CVE-2021-20674?

Priority 43/100. High severity

Software pages

WinRM and RDP vulnerabilities

References

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