Insufficient epoch key slot processing in OpenVPN 2.7_alpha1 through 2.7_rc5 allows remote authenticated users to trigger an assert resulting in a denial of service

Attack Vector Network

Attack Complexity High

Privileges Required Low

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact High

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.0005.

Exploitation none

Automatable no

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
OpenVPN OpenVPN unaffected
Version Status Constraints
2.7_alpha1 affected ≤ 2.7_rc5

No data.

No data.

No data.

Project Subscriptions

Vendors Products
Openvpn Subscribe
Openvpn Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://community.openvpn.net/Security%20Announcements/CVE-2025-15497 cve-icon cve-icon
https://www.mail-archive.com/openvpn-announce@lists.sourceforge.net/msg00156.html cve-icon cve-icon
History

Fri, 30 Jan 2026 20:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Fri, 30 Jan 2026 18:30:00 +0000

Type Values Removed Values Added
References

Fri, 30 Jan 2026 18:15:00 +0000

Type Values Removed Values Added
Description Insufficient epoch key slot processing in OpenVPN 2.7_alpha1 through 2.7_rc5 allows remote authenticated users to trigger an assert resulting in a denial of service
First Time appeared Openvpn
Openvpn openvpn
Weaknesses CWE-617
CPEs cpe:2.3:a:openvpn:openvpn:*:*:*:*:*:*:*:*
Vendors & Products Openvpn
Openvpn openvpn
References
Metrics cvssV4_0

{'score': 3.8, 'vector': 'CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H/E:U'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: OpenVPN

Published:

Updated: 2026-01-30T19:29:24.934Z

Reserved: 2026-01-09T13:26:20.838Z

Link: CVE-2025-15497

cve-icon Vulnrichment

Updated: 2026-01-30T19:29:21.905Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-01-30T18:15:55.663

Modified: 2026-02-04T16:34:21.763

Link: CVE-2025-15497

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses