How severe is CVE-2026-63649?

CVE-2026-63649 has a CVSS 4.0 base score of 4.1, rated medium severity.

Is CVE-2026-63649 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (26th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-63649?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2026-63649 published?

CVE-2026-63649 was published on 2026-08-14 and last updated on 2026-08-17.

CVE-2026-63649

CVE-2026-63649 is a medium-severity vulnerability with a CVSS 4.0 base score of 4.1. 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-183.

Key facts

Severity: Medium (CVSS 4.0 base score 4.1)
EPSS exploit prediction: 0% (26th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-183
Published: 2026-08-14
Last modified: 2026-08-17

Description

The Windows interactive service in OpenVPN 2.4.0 through 2.6.21 and 2.7_alpha1 through 2.7.5 allows local authenticated users to bypass the trusted configuration directory constraint and load arbitrary configuration files via crafted options that bypass whitelist checks

Frequently asked questions

What is CVE-2026-63649?: The Windows interactive service in OpenVPN 2.4.0 through 2.6.21 and 2.7_alpha1 through 2.7.5 allows local authenticated users to bypass the trusted configuration directory constraint and load arbitrary configuration files via crafted options that bypass whitelist checks
How severe is CVE-2026-63649?: CVE-2026-63649 has a CVSS 4.0 base score of 4.1, rated medium severity.
Is CVE-2026-63649 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (26th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-63649?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2026-63649 published?: CVE-2026-63649 was published on 2026-08-14 and last updated on 2026-08-17.

References

Other CWE-183 vulnerabilities

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