CVE-2019-12144: An issue was discovered in SSHServerAPI.dll in Progress ipswitch WS_FTP Server 2018 before 8.6.1

Q: How do I fix CVE-2019-12144?

ws ftp server: upgrade to 8.6.1. Exact commands for each OS are on this page.

Q: Is CVE-2019-12144 being exploited?

CVE-2019-12144 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-2019-12144 affect?

CVE-2019-12144 affects ws ftp server. Severity is critical (CVSS 9.8). An issue was discovered in SSHServerAPI.dll in Progress ipswitch WS_FTP Server 2018 before 8.6.1. Attackers have the ability to abuse a path traversal vulnerability using the SCP protocol. Attackers who leverage this flaw could also obtain

Q: How urgent is CVE-2019-12144?

Priority 61/100. Critical severity; Remotely exploitable, no login, no user action

This week

CRITICAL 9.8REMOTEUPGRADE

CVE-2019-12144 is a critical-severity flaw (CVSS 9.8) affecting ws ftp server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue was discovered in SSHServerAPI.dll in Progress ipswitch WS_FTP Server 2018 before 8.6.1. Attackers have the ability to abuse a path traversal vulnerability using the SCP protocol. Attackers who leverage this flaw could also obtain remote code execution by crafting a payload that abuses the SITE command feature.

Why this priority

Critical severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	2.9% (top 13%)
CISA exploited list	No
Weakness	CWE-22
Published	2019-06-11
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: ipswitch

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

Am I affected?

Timeline

2019-06-11 21:29 UTCPublished CVE record published
2026-06-17 02:14 UTCUpdated Record last modified

ipswitch ws ftp server UPGRADE

Affected: < 8.6.1

Fixed in: 8.6.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy ws-ftp-server || rpm -q ws-ftp-server || ws-ftp-server --version

2. UPGRADE to 8.6.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade ws-ftp-server

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade ws-ftp-server

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-2019-12144?

ws ftp server: upgrade to 8.6.1. Exact commands for each OS are on this page.

Is CVE-2019-12144 being exploited?

CVE-2019-12144 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-2019-12144 affect?

CVE-2019-12144 affects ws ftp server. Severity is critical (CVSS 9.8). An issue was discovered in SSHServerAPI.dll in Progress ipswitch WS_FTP Server 2018 before 8.6.1. Attackers have the ability to abuse a path traversal vulnerability using the SCP protocol. Attackers who leverage this flaw could also obtain

How urgent is CVE-2019-12144?

Priority 61/100. Critical severity; Remotely exploitable, no login, no user action

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References

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