Risk Letters

Exploited vulnerability

CVE-2025-9090

TLP:CLEAR

Tenda ac20_firmware Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')

A vulnerability was identified in Tenda AC20 16.03.08.12. Affected is the function websFormDefine of the file /goform/telnet of the component Telnet Service. The manipulation leads to command injection. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used.

Facts

  • Vendor: Tenda
  • Product: ac20_firmware
  • EPSS (probability of exploitation within 30 days): 16.7 %
  • First known exploitation: 27 September 2026
  • First seen by Risk Letters: 27 September 2026

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Data: NVD (public domain), CISA KEV, FIRST EPSS, MITRE ATT&CK, AlienVault OTX. NVD