CVE-2026-6989: Tenda F453 Telnet Service telnet TendaTelnet command injection

Vulnerability summary

CVE-2026-6989 is a high (CVSS 8.8) Injection vulnerability in tenda f453_firmware. EPSS estimates a 6.33% chance of exploitation in the next 30 days, higher than 93.6% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 25-04-2026
   PublishedVulnerability first disclosed.
2. 27-04-2026
   Last modifiedVulnerability information updated.

Description

A vulnerability has been found in Tenda F453 up to 1.0.0.3. Impacted is the function TendaTelnet of the file /goform/telnet of the component Telnet Service. Such 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.

• CWE-74Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component.
• CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component.