Denial of Service Vulnerability in OpenVPN by OpenVPN Technologies
CVE-2025-15497

3.8LOW

Key Information:

Vendor

Openvpn
Status
Openvpn
Vendor
CVE Published:
30 January 2026

What is CVE-2025-15497?

A vulnerability in OpenVPN versions 2.7_alpha1 through 2.7_rc5 allows remote authenticated users to exploit insufficient epoch key slot processing, potentially triggering an assert that results in a denial of service. This flaw could lead to network disruptions and impact service availability for users relying on the affected versions.

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Affected Version(s)

OpenVPN 2.7_alpha1 <= 2.7_rc5

References

https://community.openvpn.net/Security%20Announcements/CV...
vendor-advisory
https://www.mail-archive.com/openvpn-announce@lists.sourc...
release-notes

CVSS V4

Score:
3.8
Severity:
LOW
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

JSON
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