{"id":"CVE-2026-78221","aliases":["EUVD-2026-72276","GHSA-q6cg-7f58-2hwm","UBUNTU-CVE-2026-78221"],"status":"published","title":"An incorrect buffer size calculation in the Windows Interactive Service in OpenVPN 2.7_alpha1...","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.","severity":{"version":"4.0","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","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-08","score":0.00116,"percentile":0.0162,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-131"],"published":"2026-09-04T00:00:00Z","modified":"2026-09-11T20:53:36Z","products":[{"vendor":"openvpn","product":"openvpn"}],"references":[{"url":"https://community.openvpn.net/Security%20Announcements/CVE-2026-78221","tags":["vendor-advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-78221"},{"url":"https://github.com/advisories/GHSA-q6cg-7f58-2hwm"},{"url":"https://ubuntu.com/security/CVE-2026-78221","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-78221","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-78221","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.","status":"published","published":"2026-09-07T07:28:14.135Z","modified":"2026-09-08T14:54:43.48Z","cvss":[{"version":"4.0","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","level":"medium","assessor":"cna"}],"cwes":["CWE-131"],"updated_at":"2026-11-02T13:34:48.658051Z"}],"euvd":[{"id":"EUVD-2026-72276","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.","status":"published","published":"2026-09-07T07:28:14Z","modified":"2026-09-08T14:54:43Z","cvss":[{"version":"4.0","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","level":"medium"}],"updated_at":"2026-11-02T17:28:29.426Z"}],"ghsa":[{"id":"GHSA-q6cg-7f58-2hwm","title":"An incorrect buffer size calculation in the Windows Interactive Service in OpenVPN 2.7_alpha1...","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.","status":"published","published":"2026-09-07T09:31:39Z","modified":"2026-09-07T09:31:46Z","cvss":[{"version":"4.0","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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium"}],"cwes":["CWE-131"],"updated_at":"2026-11-02T15:11:26.557204Z"}],"nvd":[{"id":"CVE-2026-78221","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.","status":"published","published":"2026-09-07T08:17:12.813Z","modified":"2026-09-08T19:07:52.113Z","cvss":[{"version":"4.0","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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium","assessor":"secondary"}],"cwes":["CWE-131"],"updated_at":"2026-11-02T14:12:44.082631Z"}],"osv":[{"id":"UBUNTU-CVE-2026-78221","description":"[Unknown description]","status":"withdrawn","published":"2026-09-04T00:00:00Z","modified":"2026-09-11T20:53:36.108245529Z","cvss":[{"version":"4.0","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","level":"medium"}],"updated_at":"2026-11-02T16:57:18.015985Z"}]}}