CVE-2026-38142 - Vulnerability Details

Description

An unauthenticated command injection vulnerability in the /goform/fast_setting_internet_set endpoint of Tenda AC18 v15.03.05.05 allows attackers to execute arbitrary commands via a crafted payload injected into the mac parameter.

Published: 2026-07-01

Score: 6.5 Medium

EPSS: < 1% Very Low

KEV: No

Impact:

Action:

Analysis

Impact

This vulnerability is a CWE-77 OS command injection flaw that exists in the "/goform/fast_setting_internet_set" endpoint of the Tenda AC18 router firmware version 15.03.05.05. An attacker can supply a specially crafted payload in the "mac" parameter, causing the router to execute arbitrary operating system commands. The flaw does not require authentication and can be triggered by any host that can reach the router’s HTTP management interface.

Affected Systems

The affected device is the Tenda AC18 wireless router running firmware 15.03.05.05; no other vendors or product families are listed as impacted.

Risk and Exploitability

The CVSS score is 6.5, indicating medium severity. The EPSS score of less than 1% suggests a low but non‑zero likelihood of exploitation in the wild. Because the flaw is triggered via an unauthenticated HTTP request, the attack vector is network‑based, inferred from the lack of authentication and the exposed admin interface.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

n/a

affected

Version	Status	Constraints
`n/a`	affected	—

No data.

No data available yet.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

Upgrade the router firmware to the latest release to eliminate the command‑injection flaw.
Restrict access to the router’s management interface by configuring the device firewall or access control lists to allow only trusted internal networks.
Configure a host or network firewall to block or rate‑limit requests to the "/goform/fast_setting_internet_set" endpoint.
Monitor system logs and network traffic for anomalous command execution or unexpected HTTP requests targeting the vulnerable endpoint.

Generated by OpenCVE AI on August 3, 2026 at 06:15 UTC.

Tracking

Sign in to view the affected projects.

Advisories

No advisories yet.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00685.

Exploitation poc

Automatable yes

Technical Impact partial

References

Link	Providers
https://github.com/longqx223/Tenda-ac-18-V15.03.05.05-/blob/main/Tenda%20AC18%20Unauthenticated%20Second-Order%20OS%20Command%20Injection%20in%20goformfast_setting_internet_set.pdf

History

Mon, 03 Aug 2026 06:45:00 +0000

Type	Values Removed	Values Added
Title	Unauthenticated OS Command Injection in Tenda AC18 Router

Wed, 29 Jul 2026 22:15:00 +0000

Type	Values Removed	Values Added
Title		Unauthenticated OS Command Injection in Tenda AC18 Router

Sat, 25 Jul 2026 23:00:00 +0000

Type	Values Removed	Values Added
Title	Unauthenticated Command Injection in Tenda AC18 Router

Wed, 22 Jul 2026 15:00:00 +0000

Type	Values Removed	Values Added
Title		Unauthenticated Command Injection in Tenda AC18 Router

Fri, 17 Jul 2026 13:45:00 +0000

Type	Values Removed	Values Added
Title	Unauthenticated OS Command Injection in Tenda AC18 Firmware 15.03.05.05

Wed, 15 Jul 2026 23:15:00 +0000

Type	Values Removed	Values Added
Title		Unauthenticated OS Command Injection in Tenda AC18 Firmware 15.03.05.05

Mon, 13 Jul 2026 16:00:00 +0000

Type	Values Removed	Values Added
Title	Unauthenticated Command Injection in Tenda AC18 /goform/fast_setting_internet_set Endpoint

Sun, 12 Jul 2026 02:15:00 +0000

Type	Values Removed	Values Added
Title		Unauthenticated Command Injection in Tenda AC18 /goform/fast_setting_internet_set Endpoint

Sat, 11 Jul 2026 02:15:00 +0000

Type	Values Removed	Values Added
Title	Arbitrary Command Execution via Unauthenticated mac Parameter in Tenda AC18

Thu, 09 Jul 2026 14:45:00 +0000

Type	Values Removed	Values Added
Title		Arbitrary Command Execution via Unauthenticated mac Parameter in Tenda AC18

Wed, 08 Jul 2026 08:00:00 +0000

Type	Values Removed	Values Added
Title	Unauthenticated OS Command Injection in Tenda AC18 '/goform/fast_setting_internet_set' Endpoint

Tue, 07 Jul 2026 09:45:00 +0000

Type	Values Removed	Values Added
Title		Unauthenticated OS Command Injection in Tenda AC18 '/goform/fast_setting_internet_set' Endpoint

Mon, 06 Jul 2026 12:15:00 +0000

Type	Values Removed	Values Added
Title	Unauthenticated Command Injection in Tenda AC18 Router Firmware 15.03.05.05

Sun, 05 Jul 2026 22:30:00 +0000

Type	Values Removed	Values Added
Title		Unauthenticated Command Injection in Tenda AC18 Router Firmware 15.03.05.05

Sun, 05 Jul 2026 14:15:00 +0000

Type	Values Removed	Values Added
Title	Unauthenticated OS Command Injection in Tenda AC18 Router Firmware

Sat, 04 Jul 2026 22:45:00 +0000

Type	Values Removed	Values Added
Title		Unauthenticated OS Command Injection in Tenda AC18 Router Firmware

Sat, 04 Jul 2026 11:30:00 +0000

Type	Values Removed	Values Added
Title	Unauthenticated OS Command Injection via mac Parameter in Tenda AC18 Router

Fri, 03 Jul 2026 23:15:00 +0000

Type	Values Removed	Values Added
Title		Unauthenticated OS Command Injection via mac Parameter in Tenda AC18 Router

Fri, 03 Jul 2026 16:15:00 +0000

Type	Values Removed	Values Added
Title	Unauthenticated OS Command Injection in Tenda AC18 Router

Fri, 03 Jul 2026 02:00:00 +0000

Type	Values Removed	Values Added
Title		Unauthenticated OS Command Injection in Tenda AC18 Router

Thu, 02 Jul 2026 19:30:00 +0000

Type	Values Removed	Values Added
Title	Unauthenticated OS Command Injection in Tenda AC18 Router

Thu, 02 Jul 2026 14:15:00 +0000

Type	Values Removed	Values Added
Title		Unauthenticated OS Command Injection in Tenda AC18 Router

Thu, 02 Jul 2026 06:15:00 +0000

Type	Values Removed	Values Added
Title	Unauthenticated OS Command Injection in Tenda AC18 Router

Wed, 01 Jul 2026 22:00:00 +0000

Type	Values Removed	Values Added
Title		Unauthenticated OS Command Injection in Tenda AC18 Router

Wed, 01 Jul 2026 19:30:00 +0000

Type	Values Removed	Values Added
Weaknesses		CWE-77
Metrics		cvssV3_1 `{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N'}` ssvc `{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Wed, 01 Jul 2026 18:30:00 +0000

Type	Values Removed	Values Added
Description		An unauthenticated command injection vulnerability in the /goform/fast_setting_internet_set endpoint of Tenda AC18 v15.03.05.05 allows attackers to execute arbitrary commands via a crafted payload injected into the mac parameter.
References		https://github.com/longqx223/Tenda-ac-18-V15.03.05.05-/blob/main/Tenda%20AC18%20Unauthenticated%20Second-Order%20OS%20Command%20Injection%20in%20goformfast_setting_internet_set.pdf

Subscriptions

No data.

MITRE

Status: PUBLISHED

Assigner: mitre

Published: 2026-07-01T00:00:00.000Z

Updated: 2026-07-01T18:48:02.280Z

Reserved: 2026-04-06T00:00:00.000Z

Link: CVE-2026-38142

Vulnrichment

Updated: 2026-07-01T18:47:57.461Z

NVD

No data.

Redhat

No data.

OpenCVE Enrichment

Updated: 2026-08-03T06:30:17Z

Weaknesses

CWE-77
Improper Neutralization of Special Elements used in a Command ('Command Injection')

Impact

Affected Systems

Risk and Exploitability

Tracking

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact None

User Interaction None

Exploitation poc

Automatable yes

Technical Impact partial

Subscriptions

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