CVE-2021-31755 - Vulnerability Details - OpenCVE

An issue was discovered on Tenda AC11 devices with firmware through 02.03.01.104_CN. A stack buffer overflow vulnerability in /goform/setmac allows attackers to execute arbitrary code on the system via a crafted post request.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

Access Vector Network

Access Complexity Low

Authentication None

Confidentiality Impact Complete

Integrity Impact Complete

Availability Impact Complete

This CVE is in the KEV database since Nov. 3, 2021.

The EPSS score is 0.9423.

Exploitation active

Automatable yes

Technical Impact total

Vendors	Products
Tenda	Ac11 Ac11 Firmware

Configuration 1 [-]

AND

cpe:2.3:o:tenda:ac11_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:tenda:ac11:-:*:*:*:*:*:*:*

No data.

No data.

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References

Link	Providers
https://github.com/Yu3H0/IoT_CVE/tree/main/Tenda/CVE_3
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-31755

History

Wed, 22 Oct 2025 00:15:00 +0000

Type	Values Removed	Values Added
References		https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-31755

Tue, 21 Oct 2025 20:30:00 +0000

Type	Values Removed	Values Added
References	https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-31755

Tue, 21 Oct 2025 19:30:00 +0000

Type	Values Removed	Values Added
References		https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-31755

Tue, 04 Feb 2025 20:15:00 +0000

Type	Values Removed	Values Added
Metrics		kev `{'dateAdded': '2021-11-03'}` ssvc `{'options': {'Automatable': 'yes', 'Exploitation': 'active', 'Technical Impact': 'total'}, 'version': '2.0.3'}`

MITRE

Status: PUBLISHED

Assigner: mitre

Published: 2021-05-07T22:01:44.000Z

Updated: 2025-10-21T23:25:46.571Z

Reserved: 2021-04-23T00:00:00.000Z

Link: CVE-2021-31755

Vulnrichment

Updated: 2024-08-03T23:03:33.780Z

NVD

Status : Modified

Published: 2021-05-07T23:15:07.047

Modified: 2025-10-22T00:17:36.023

Link: CVE-2021-31755

Redhat

No data.

OpenCVE Enrichment

No data.

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