CVE-2021-28927: Libretro Retroarch

High severity, CVSS 7.8. EPSS: 1.3% chance of exploitation in the next 30 days.

The text-to-speech engine in libretro RetroArch for Windows 1.9.0 passes unsanitized input to PowerShell through platform_win32.c via the accessibility_speak_windows function, which allows attackers who have write access on filesystems that are used by RetroArch to execute code via command injection using specially a crafted file and directory names.

Affected products

• Libretro Retroarch: from 1.9.0, up to and including 1.9.4

Published 2021-04-07. Last modified 2026-07-09.