CVE-2020-12128: DONG JOO CHO File Transfer iFamily 2.1 allows directory traversal related to the ./etc/ path.

This week

HIGH 7.5REMOTEDOWNGRADE

CVE-2020-12128 is a high-severity flaw (CVSS 7.5) affecting file transfer ifamily. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

DONG JOO CHO File Transfer iFamily 2.1 allows directory traversal related to the ./etc/ path.

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.6% (top 24%)
CISA exploited list	No
Weakness	CWE-22
Published	2020-04-24
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: file transfer ifamily project

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

Am I affected?

Timeline

2020-04-24 00:15 UTCPublished CVE record published
2026-06-17 02:51 UTCUpdated Record last modified

file transfer ifamily project file transfer ifamily DOWNGRADE

Affected: 2.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.1

1. Check installed version

apt-cache policy file-transfer-ifamily || rpm -q file-transfer-ifamily || file-transfer-ifamily --version

2. No fixed release: DOWNGRADE to a release before 2.1 (Debian / Ubuntu)

apt-cache madison file-transfer-ifamily sudo apt install file-transfer-ifamily=<VERSION_BEFORE_2.1> sudo apt-mark hold file-transfer-ifamily

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list file-transfer-ifamily sudo dnf downgrade file-transfer-ifamily-<VERSION_BEFORE_2.1> sudo dnf versionlock add file-transfer-ifamily

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2020-12128?

file transfer ifamily: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2020-12128 being exploited?

CVE-2020-12128 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-2020-12128 affect?

CVE-2020-12128 affects file transfer ifamily. Severity is high (CVSS 7.5). DONG JOO CHO File Transfer iFamily 2.1 allows directory traversal related to the ./etc/ path.

How urgent is CVE-2020-12128?

Priority 55/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

References

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