CVE-2017-16757: Hola VPN 1.34 has weak permissions (Everyone:F) under %PROGRAMFILES%, which allows local users to gain privile

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HIGH 7.8DOWNGRADE

CVE-2017-16757 is a high-severity flaw (CVSS 7.8) affecting vpn. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Hola VPN 1.34 has weak permissions (Everyone:F) under %PROGRAMFILES%, which allows local users to gain privileges via a Trojan horse 7za.exe or hola.exe file.

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	0.4% (top 66%)
CISA exploited list	No
Weakness	CWE-732
Published	2017-11-09
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: hola

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

Am I affected?

Timeline

2017-11-09 21:29 UTCPublished CVE record published
2026-06-17 01:09 UTCUpdated Record last modified

hola vpn DOWNGRADE

Affected: 1.34

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.34

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.34 (Debian / Ubuntu)

apt-cache madison vpn sudo apt install vpn=<VERSION_BEFORE_1.34> sudo apt-mark hold vpn

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

dnf --showduplicates list vpn sudo dnf downgrade vpn-<VERSION_BEFORE_1.34> sudo dnf versionlock add vpn

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-2017-16757?

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

Is CVE-2017-16757 being exploited?

CVE-2017-16757 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-2017-16757 affect?

CVE-2017-16757 affects vpn. Severity is high (CVSS 7.8). Hola VPN 1.34 has weak permissions (Everyone:F) under %PROGRAMFILES%, which allows local users to gain privileges via a Trojan horse 7za.exe or hola.exe file.

How urgent is CVE-2017-16757?

Priority 41/100. High severity; Public exploit reference

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References

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