Three vulnerabilities in Daktronics controller firmware—one carrying a CVSS v4 score of 9.3—let an unauthenticated attacker gain root-level access and full control of scoreboards and other display systems deployed worldwide. CISA published the advisory on June 25, crediting Thomas Jou of Princeton University for the findings.
Hardcoded Credentials Open the Door
CVE-2026-31928 is the ugliest: DMP-5000 units ship with a default administrative web account that doesn't require a password change during initial setup. The advisory explicitly states these accounts provide full system access. CVSS v4 clocks it at 9.3 Critical—network-attackable, low complexity, no privileges required. That’s not a vulnerability; that’s a backdoor left in by design.
Path Traversal and Unrestricted File Upload Follow
CVE-2026-28701 affects the same family (VFC-DMP-5000, DMP-5000, DMP-8000). Authenticated and unauthenticated remote users can escape the intended directory and walk any file system path. CVSS v4: another 9.3 Critical. Pair that with CVE-2026-33560, where the DMP-5000 file service exposes endpoints that accept executable binaries and scripts without any extension filtering or content inspection. CVSS v4 for that one: 8.4 High. An attacker who lands a file onto the server can execute arbitrary code.
Mitigation: Three Firmware Branches and a Password Change
Daktronics’ official fix pushes three firmware branches depending on the product configuration: 8.117.0.x, 9.43.0.x, or 10.34.0.x. The advisory also recommends updating default passwords and using strong, unique credentials per device. That second step should not be optional—if you haven’t changed the default admin password on a Daktronics controller, your scoreboard is a node waiting for a shell.
CISA notes no known public exploitation yet. With scoreboards in stadiums, emergency services, and healthcare facilities running this firmware, Daktronics’ update cycle—now pulling three distinct firmware branches—needs to be fast-tracked; otherwise, those displays become attack surfaces rather than scoreboards.
Source: Daktronics Controller Firmware
Domain: cisa.gov
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