Description
A weakness has been identified in Tenda CP3 27.5.57.101. This issue affects some unknown processing of the file Net/NetCheckPing.cpp. This manipulation of the argument interface_name/host causes os command injection. The attack can be initiated remotely.
Published: 2026-09-05
Score: 9.4 Critical
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Impact

The vulnerability is an OS command injection flaw in the NetCheckPing.cpp component of the Tenda CP3 router firmware version 27.5.57.101. By manipulating the interface_name/host argument, an attacker can execute arbitrary OS commands when the NetCheckPing interface is invoked. The flaw satisfies CWE‑77 and CWE‑78, and can be used to compromise confidentiality, integrity, and availability of the device and any connected networks.

Affected Systems

Affected devices are Tenda CP3 routers running firmware 27.5.57.101. The precise product is Tenda CP3.

Risk and Exploitability

The CVSS score of 9.4 indicates critical severity, and exploitation can occur remotely without authentication. EPSS data is not available, but the absence of a KEV listing does not reduce the urgency. The attack vector is likely a network‑based request that triggers the vulnerable NetCheckPing path, allowing the attacker to control execution of shell commands on the device. Given the high severity and remote nature, the risk is considered high.

Generated by OpenCVE AI on September 5, 2026 at 23:50 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Update the router firmware to the latest version released by Tenda, which removes the vulnerable NetCheckPing functionality.
  • If a firmware update is not available, disable or block access to the NetCheckPing endpoint by configuring firewall rules or disconnecting the affected interface.
  • Implement network segmentation so that the router is isolated from critical internal resources, limiting the impact of any successful exploitation.
  • Monitor traffic to detect abnormal NetCheckPing requests and audit system logs for evidence of command injection attempts.

Generated by OpenCVE AI on September 5, 2026 at 23:50 UTC.

Tracking

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Advisories

No advisories yet.

History

Sat, 05 Sep 2026 23:45:00 +0000

Type Values Removed Values Added
First Time appeared Tenda cp3
Vendors & Products Tenda cp3

Sat, 05 Sep 2026 22:15:00 +0000

Type Values Removed Values Added
Description A weakness has been identified in Tenda CP3 27.5.57.101. This issue affects some unknown processing of the file Net/NetCheckPing.cpp. This manipulation of the argument interface_name/host causes os command injection. The attack can be initiated remotely.
Title Tenda CP3 NetCheckPing.cpp os command injection
First Time appeared Tenda
Tenda cp3 Firmware
Weaknesses CWE-77
CWE-78
CPEs cpe:2.3:o:tenda:cp3_firmware:*:*:*:*:*:*:*:*
Vendors & Products Tenda
Tenda cp3 Firmware
References
Metrics cvssV2_0

{'score': 8.3, 'vector': 'AV:N/AC:L/Au:M/C:C/I:C/A:C/E:ND/RL:ND/RC:UR'}

cvssV3_0

{'score': 9.1, 'vector': 'CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H/E:X/RL:X/RC:R'}

cvssV3_1

{'score': 9.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H/E:X/RL:X/RC:R'}

cvssV4_0

{'score': 9.4, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X'}

Subscriptions

Tenda Cp3 Cp3 Firmware
cve-icon MITRE

Status: PUBLISHED

Assigner: VulDB

Published:

Updated: 2026-09-05T22:00:09.574Z

Reserved: 2026-09-05T07:40:20.137Z

Link: CVE-2026-86149

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-09-05T22:17:18.943

Modified: 2026-09-05T22:17:18.943

Link: CVE-2026-86149

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-06T00:00:05Z

Weaknesses
  • CWE-77

    Improper Neutralization of Special Elements used in a Command ('Command Injection')

  • CWE-78

    Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')