CVE-2025-57638: Tenda AC9 Firmware

High severity, CVSS 7.5. EPSS: 0.4% chance of exploitation in the next 30 days.

Buffer overflow vulnerability in Tenda AC9 1.0 via the user supplied sys.vendor configuration value.

Affected products

• Tenda AC9 Firmware: version 1.0 only

Published 2025-09-23. Last modified 2026-06-17.