Security advisory

{
  "id": "8ad50051d45ae5a8eceaf330592346b7fa2072663d619d0aafcb185656623436",
  "url": "https://osv.dev/vulnerability/CVE-2021-28927",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-28927",
    "summary": "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.",
    "evidence": "osv:CVE-2021-28927",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2021-28927",
      "aliases": [
        "CVE-2021-28927"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/libretro/retroarch",
              "type": "GIT",
              "events": [
                {
                  "introduced": "5e551dd92b79d8127e66939835ea3c2a140c4078"
                },
                {
                  "last_affected": "c226bd87f47b3fdec642216fcaf6edc651e30eb4"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:libretro:retroarch:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "1.9.0"
                      },
                      {
                        "last_affected": "1.9.4"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v1.9.4",
            "v1.9.3",
            "v1.9.2",
            "v1.9.1",
            "v1.9.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-28927.json"
          }
        }
      ],
      "modified": "2026-10-20T10:55:54.986361365Z",
      "provider": "osv",
      "references": [
        "https://github.com/libretro/RetroArch/blob/d3dc3ee989ec6a4903c689907ffc47027f71f776/frontend/drivers/platform_win32.c",
        "https://labs.bishopfox.com/advisories/retroarch-for-windows-version-1.9.0"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-28927",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 387082,
  "published_at": "2021-04-07T15:15:13.623+00:00"
}