CVE-2020-13866: WinGate v9.4.1.5998 has insecure permissions for the installation directory, which allows local users to gain

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HIGH 7.8DOWNGRADE

CVE-2020-13866 is a high-severity flaw (CVSS 7.8) affecting wingate. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

WinGate v9.4.1.5998 has insecure permissions for the installation directory, which allows local users to gain privileges by replacing an executable file with a Trojan horse.

Why this priority

High severity
Public exploit reference

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

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	1.1% (top 35%)
CISA exploited list	No
Weakness	CWE-732
Published	2020-06-08
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: qbik

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

Am I affected?

Timeline

2020-06-08 16:15 UTCPublished CVE record published
2026-06-17 02:53 UTCUpdated Record last modified

qbik wingate DOWNGRADE

Affected: 9.4.1.5998

Fixed in: no fixed release known

Safe to downgrade to: a release before 9.4.1.5998

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 9.4.1.5998 (Debian / Ubuntu)

apt-cache madison wingate sudo apt install wingate=<VERSION_BEFORE_9.4.1.5998> sudo apt-mark hold wingate

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

dnf --showduplicates list wingate sudo dnf downgrade wingate-<VERSION_BEFORE_9.4.1.5998> sudo dnf versionlock add wingate

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.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: WinGate 9.4.1.5998 - Insecure Folder Permissions

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-2020-13866?

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

Is CVE-2020-13866 being exploited?

CVE-2020-13866 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-2020-13866 affect?

CVE-2020-13866 affects wingate. Severity is high (CVSS 7.8). WinGate v9.4.1.5998 has insecure permissions for the installation directory, which allows local users to gain privileges by replacing an executable file with a Trojan horse.

How urgent is CVE-2020-13866?

Priority 48/100. High severity; Public exploit reference

References

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