How severe is CVE-2026-13698?

CVE-2026-13698 has a CVSS 4.0 base score of 6.0, rated medium severity.

Is CVE-2026-13698 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (40th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-13698?

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

When was CVE-2026-13698 published?

CVE-2026-13698 was published on 2026-07-06.

CVE-2026-13698

CVE-2026-13698 is a medium-severity vulnerability with a CVSS 4.0 base score of 6.0. 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-401.

Key facts

Severity: Medium (CVSS 4.0 base score 6.0)
EPSS exploit prediction: 1% (40th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-401
Published: 2026-07-06
Last modified: 2026-07-06

Description

A memory leak in OpenVPN version 2.5.0 through 2.5.11, 2.6.0 through 2.6.20 and 2.7_alpha1 through 2.7.4 allows remote attackers with a valid tls-crypt-v2 client key to potentially cause a denial of service

Frequently asked questions

What is CVE-2026-13698?: A memory leak in OpenVPN version 2.5.0 through 2.5.11, 2.6.0 through 2.6.20 and 2.7_alpha1 through 2.7.4 allows remote attackers with a valid tls-crypt-v2 client key to potentially cause a denial of service
How severe is CVE-2026-13698?: CVE-2026-13698 has a CVSS 4.0 base score of 6.0, rated medium severity.
Is CVE-2026-13698 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (40th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-13698?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2026-13698 published?: CVE-2026-13698 was published on 2026-07-06.

References

https://community.openvpn.net/Security%20Announcements/CVE-2026-13698

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