CVE-2026-86151: Tenda CP3 Network Configuration Management system.c sub_2F77E8 os command injection

Vulnerability summary

CVE-2026-86151 is a critical (CVSS 9.4) Command Injection vulnerability in tenda cp3_firmware. EPSS estimates a 2.94% chance of exploitation in the next 30 days, higher than 87% of scored vulnerabilities.

Timeline

1. 05-09-2026
   PublishedVulnerability first disclosed.
2. 11-09-2026
   Last modifiedVulnerability information updated.

Description

A vulnerability was detected in Tenda CP3 27.5.57.101. The affected element is the function sub_2F77E8 of the file Apis/system.c of the component Network Configuration Management. Performing a manipulation results in os command injection. The attack may be initiated remotely.

• 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.
• CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.