An incorrect buffer size calculation in the Windows Interactive Service in OpenVPN 2.7_alpha1 through 2.7.6 allows local authenticated users to cause memory corruption or disclose sensitive information via crafted NRPT inputs.
Advisories

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Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Tue, 08 Sep 2026 15:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

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


Tue, 08 Sep 2026 00:15:00 +0000

Type Values Removed Values Added
Title Memory Corruption and Sensitive Information Disclosure via Crafted NRPT Inputs in Windows Interactive Service OpenVPN: OpenVPN: Memory corruption and information disclosure vulnerability
Weaknesses CWE-120
References
Metrics threat_severity

None

cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:H'}

threat_severity

Important


Mon, 07 Sep 2026 08:45:00 +0000

Type Values Removed Values Added
Title Memory Corruption and Sensitive Information Disclosure via Crafted NRPT Inputs in Windows Interactive Service
First Time appeared Openvpn
Openvpn openvpn
Vendors & Products Openvpn
Openvpn openvpn

Mon, 07 Sep 2026 07:45:00 +0000

Type Values Removed Values Added
Description An incorrect buffer size calculation in the Windows Interactive Service in OpenVPN 2.7_alpha1 through 2.7.6 allows local authenticated users to cause memory corruption or disclose sensitive information via crafted NRPT inputs.
Weaknesses CWE-131
References
Metrics cvssV4_0

{'score': 5.9, 'vector': 'CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:P/VC:H/VI:N/VA:H/SC:H/SI:N/SA:H'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: OpenVPN

Published:

Updated: 2026-09-08T14:54:43.480Z

Reserved: 2026-08-26T14:41:20.459Z

Link: CVE-2026-78221

cve-icon Vulnrichment

Updated: 2026-09-08T14:54:38.181Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-09-07T08:17:12.813

Modified: 2026-09-08T19:07:52.113

Link: CVE-2026-78221

cve-icon Redhat

Severity : Important

Publid Date: 2026-09-07T07:28:14Z

Links: CVE-2026-78221 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-09-08T02:00:20Z

Weaknesses