How severe is CVE-2020-8635?

CVE-2020-8635 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-8635 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-8635?

CVE-2020-8635 primarily affects Wftpserver Wing Ftp Server. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-8635?

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

When was CVE-2020-8635 published?

CVE-2020-8635 was published on 2020-03-07 and last updated on 2026-06-17.

CVE-2020-8635

CVE-2020-8635 is a high-severity vulnerability in Wftpserver Wing Ftp Server with a CVSS 3.x base score of 7.8. 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-732.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 7.2
EPSS exploit prediction: 1% (52nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-732
Affected product: Wftpserver Wing Ftp Server
Published: 2020-03-07
Last modified: 2026-06-17

Description

Wing FTP Server v6.2.3 for Linux, macOS, and Solaris sets insecure permissions on installation directories and configuration files. This allows local users to arbitrarily create FTP users with full privileges, and escalate privileges within the operating system by modifying system files.

Frequently asked questions

What is CVE-2020-8635?: Wing FTP Server v6.2.3 for Linux, macOS, and Solaris sets insecure permissions on installation directories and configuration files. This allows local users to arbitrarily create FTP users with full privileges, and escalate privileges within the operating system by modifying system files.
How severe is CVE-2020-8635?: CVE-2020-8635 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-8635 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-8635?: CVE-2020-8635 primarily affects Wftpserver Wing Ftp Server. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-8635?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2020-8635 published?: CVE-2020-8635 was published on 2020-03-07 and last updated on 2026-06-17.

References

https://www.hooperlabs.xyz/disclosures/cve-2020-8635.php

Affected products (3)

cpe:2.3:a:wftpserver:wing_ftp_server:6.2.3:*:*:*:*:linux:*:*
cpe:2.3:a:wftpserver:wing_ftp_server:6.2.3:*:*:*:*:macos:*:*
cpe:2.3:a:wftpserver:wing_ftp_server:6.2.3:*:*:*:*:solaris:*:*

More vulnerabilities in Wftpserver Wing Ftp Server

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CVE-2020-37032 — High (CVSS 8.8): Wing FTP Server 6.3.8 contains a remote code execution vulnerability in its Lua-based web console that allows…
CVE-2019-25267 — High (CVSS 7.8): Wing FTP Server 6.0.7 contains an unquoted service path vulnerability that allows local attackers to potentially…
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CVE-2020-8634 — High (CVSS 7.8): Wing FTP Server v6.2.3 for Linux, macOS, and Solaris sets insecure permissions on files modified within the HTTP file…
CVE-2026-44403 — High (CVSS 7.2): Wing FTP Server before 8.1.3 contains an authenticated remote code execution vulnerability in the session serialization…

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