How severe is CVE-2019-12146?

CVE-2019-12146 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2019-12146 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (90th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-12146?

CVE-2019-12146 affects Ipswitch Ws Ftp Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-12146?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2019-12146 published?

CVE-2019-12146 was published on 2019-06-11 and last updated on 2026-06-17.

CVE-2019-12146

CVE-2019-12146 is a critical-severity vulnerability in Ipswitch Ws Ftp Server with a CVSS 3.x base score of 9.1. 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-22.

Key facts

Severity: Critical (CVSS 3.x base score 9.1)
CVSS v2: 6.4
EPSS exploit prediction: 4% (90th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-22
Affected product: Ipswitch Ws Ftp Server
Published: 2019-06-11
Last modified: 2026-06-17

Description

A Directory Traversal issue was discovered in SSHServerAPI.dll in Progress ipswitch WS_FTP Server 2018 before 8.6.1. Attackers have the ability to abuse a flaw in the SCP listener by crafting strings using specific patterns to write files and create directories outside of their authorized directory.

Frequently asked questions

What is CVE-2019-12146?: A Directory Traversal issue was discovered in SSHServerAPI.dll in Progress ipswitch WS_FTP Server 2018 before 8.6.1. Attackers have the ability to abuse a flaw in the SCP listener by crafting strings using specific patterns to write files and create directories outside of their authorized directory.
How severe is CVE-2019-12146?: CVE-2019-12146 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2019-12146 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (90th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-12146?: CVE-2019-12146 affects Ipswitch Ws Ftp Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-12146?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2019-12146 published?: CVE-2019-12146 was published on 2019-06-11 and last updated on 2026-06-17.

References

https://docs.ipswitch.com/WS_FTP_Server2018/ReleaseNotes/index.htm#49242.htm

Affected products (1)

cpe:2.3:a:ipswitch:ws_ftp_server:*:*:*:*:*:*:*:*

More vulnerabilities in Ipswitch Ws Ftp Server

CVE-2019-12144 — 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…
CVE-2019-12145 — High (CVSS 7.5): A Directory Traversal issue was discovered in SSHServerAPI.dll in Progress ipswitch WS_FTP Server 2018 before 8.6.1. An…
CVE-2006-4974 — High (CVSS 7.5): Buffer overflow in Ipswitch WS_FTP Limited Edition (LE) 5.08 allows remote FTP servers to execute arbitrary code via a…
CVE-2004-1884 — High (CVSS 7.5): Ipswitch WS_FTP Server 4.0.2 has a backdoor XXSESS_MGRYY username with a default password, which allows remote…
CVE-2003-0772 — High (CVSS 7.5): Multiple buffer overflows in WS_FTP 3 and 4 allow remote authenticated users to cause a denial of service and possibly…
CVE-2007-0666 — Medium (CVSS 6.8): Ipswitch WS_FTP Server 5.04 allows FTP site administrators to execute arbitrary code on the system via a long input…

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