# CVE-2026-78221

## Summary

- **CVE ID:** CVE-2026-78221
- **Severity:** MEDIUM
- **CVSS Score:** 5.9 (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)
- **CWE:** CWE-131
- **Published:** Sep 7, 2026
- **Last Modified:** Sep 8, 2026

## 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.

## Affected Products

- OpenVPN — OpenVPN (2.7_alpha1)

## References

- [CNA](https://community.openvpn.net/Security%20Announcements/CVE-2026-78221)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.12%
- **EPSS Percentile:** 1.8

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._