CVE-2025-3461: Onsemi Qcs-AX2-a12 Firmware

Critical severity, CVSS 9.8. EPSS: 0.6% chance of exploitation in the next 30 days.

The Quantenna Wi-Fi chips ship with an unauthenticated telnet interface by default. This is an instance of CWE-306, "Missing Authentication for Critical Function," and is estimated as a CVSS 9.1 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N). This issue affects Quantenna Wi-Fi chipset through version 8.0.0.28 of the latest SDK, and appears to be unpatched at the time of this CVE record's first publishing, though the vendor has released a best practices guide for implementors of this chipset.

Affected products

• Onsemi Qcs-AX2-a12 Firmware: affected versions not specified
• Onsemi Qcs-AX2-s5 Firmware: affected versions not specified
• Onsemi Qcs-AX2-t12 Firmware: affected versions not specified
• Onsemi Qcs-AX2-t8 Firmware: affected versions not specified
• Onsemi Qcs-AX3-a12 Firmware: affected versions not specified
• Onsemi Qcs-AX3-s5 Firmware: affected versions not specified
• Onsemi Qcs-AX3-t12 Firmware: affected versions not specified
• Onsemi Qcs-AX3-t8 Firmware: affected versions not specified
• Onsemi QD840 Firmware: affected versions not specified
• Onsemi QHS710 Firmware: affected versions not specified
• Onsemi QSR10GA Firmware: affected versions not specified
• Onsemi QSR10GU Firmware: affected versions not specified
• Onsemi QV840 Firmware: affected versions not specified
• Onsemi QV840C Firmware: affected versions not specified
• Onsemi QV860 Firmware: affected versions not specified
• Onsemi QV940 Firmware: affected versions not specified
• Onsemi QV942C Firmware: affected versions not specified
• Onsemi QV952C Firmware: affected versions not specified

Published 2025-06-08. Last modified 2026-06-17.