CVE-2023-36671: An issue was discovered in the Clario VPN client through 5.9.1.1662 for macOS

Q: How do I fix CVE-2023-36671?

vpn: upgrade to newer than 5.9.1.1662. Exact commands for each OS are on this page.

Q: Is CVE-2023-36671 being exploited?

CVE-2023-36671 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-2023-36671 affect?

CVE-2023-36671 affects vpn. Severity is medium (CVSS 6.3). An issue was discovered in the Clario VPN client through 5.9.1.1662 for macOS. The VPN client insecurely configures the operating system such that all IP traffic to the VPN server's IP address is sent in plaintext outside the VPN tunnel eve

Q: How urgent is CVE-2023-36671?

Priority 31/100. Public exploit reference

Routine

MEDIUM 6.3UPGRADE

CVE-2023-36671 is a medium-severity flaw (CVSS 6.3) affecting vpn. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue was discovered in the Clario VPN client through 5.9.1.1662 for macOS. The VPN client insecurely configures the operating system such that all IP traffic to the VPN server's IP address is sent in plaintext outside the VPN tunnel even if this traffic is not generated by the VPN client. This allows an adversary to trick the victim into sending plaintext traffic to the VPN server's IP address and thereby deanonymize the victim. NOTE: the tun

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	6.3 (Medium)
Attack vector	Local
Attack complexity	High
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.3% (top 83%)
CISA exploited list	No
Weakness	CWE-319
Published	2023-08-09
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: clario

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

Am I affected?

Timeline

2023-08-09 23:15 UTCPublished CVE record published
2026-06-17 06:06 UTCUpdated Record last modified

clario vpn UPGRADE

Affected: <= 5.9.1.1662

Fixed in: newer than 5.9.1.1662

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 5.9.1.1662 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade vpn

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade vpn

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-2023-36671?

vpn: upgrade to newer than 5.9.1.1662. Exact commands for each OS are on this page.

Is CVE-2023-36671 being exploited?

CVE-2023-36671 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-2023-36671 affect?

CVE-2023-36671 affects vpn. Severity is medium (CVSS 6.3). An issue was discovered in the Clario VPN client through 5.9.1.1662 for macOS. The VPN client insecurely configures the operating system such that all IP traffic to the VPN server's IP address is sent in plaintext outside the VPN tunnel eve

How urgent is CVE-2023-36671?

Priority 31/100. Public exploit reference

Software pages

macOS vulnerabilities

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References

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