A security flaw has been discovered in Tenda AC21 up to 16.03.08.16. Affected by this vulnerability is the function sscanf of the file /goform/SetStaticRouteCfg. The manipulation of the argument list results in buffer overflow. The attack can be launched remotely. The exploit has been released to the public and may be exploited.

Metrics

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

Access Vector Network

Access Complexity Low

Authentication Single

Confidentiality Impact Complete

Integrity Impact Complete

Availability Impact Complete

This CVE is not in the KEV list.

The EPSS score is 0.00088.

Exploitation poc

Automatable no

Technical Impact total

Affected Vendors & Products

Vendors Products
Tenda
  • Ac21
  • Ac21 Firmware

Configuration 1 [-]

AND
cpe:2.3:o:tenda:ac21_firmware:*:*:*:*:*:*:*:*
cpe:2.3:h:tenda:ac21:-:*:*:*:*:*:*:*

No data.

OpenCVE Enrichment is a feature of OpenCVE that uses AI to automatically link vendors and products to CVEs. Learn more on GitHub.

Vendors Products
Tenda
  • Ac21
Advisories
Source ID Title
EUVD EUVD EUVD-2025-31447 A security flaw has been discovered in Tenda AC21 up to 16.03.08.16. Affected by this vulnerability is the function sscanf of the file /goform/SetStaticRouteCfg. The manipulation of the argument list results in buffer overflow. The attack can be launched remotely. The exploit has been released to the public and may be exploited.
Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/maximdevere/CVE2/issues/2 cve-icon cve-icon cve-icon
https://vuldb.com/?ctiid.326173 cve-icon cve-icon
https://vuldb.com/?id.326173 cve-icon cve-icon
https://vuldb.com/?submit.661806 cve-icon cve-icon
https://www.tenda.com.cn/ cve-icon cve-icon
History

Fri, 03 Oct 2025 15:00:00 +0000

Type Values Removed Values Added
First Time appeared Tenda ac21 Firmware
CPEs cpe:2.3:h:tenda:ac21:-:*:*:*:*:*:*:*
cpe:2.3:o:tenda:ac21_firmware:*:*:*:*:*:*:*:*
Vendors & Products Tenda ac21 Firmware

Mon, 29 Sep 2025 15:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Mon, 29 Sep 2025 09:45:00 +0000

Type Values Removed Values Added
First Time appeared Tenda
Tenda ac21
Vendors & Products Tenda
Tenda ac21

Sun, 28 Sep 2025 02:00:00 +0000

Type Values Removed Values Added
Description A security flaw has been discovered in Tenda AC21 up to 16.03.08.16. Affected by this vulnerability is the function sscanf of the file /goform/SetStaticRouteCfg. The manipulation of the argument list results in buffer overflow. The attack can be launched remotely. The exploit has been released to the public and may be exploited.
Title Tenda AC21 SetStaticRouteCfg sscanf buffer overflow
Weaknesses CWE-119
CWE-120
References
Metrics cvssV2_0

{'score': 9, 'vector': 'AV:N/AC:L/Au:S/C:C/I:C/A:C/E:POC/RL:ND/RC:UR'}

cvssV3_0

{'score': 8.8, 'vector': 'CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R'}

cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R'}

cvssV4_0

{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P'}
cve-icon MITRE

Status: PUBLISHED

Assigner: VulDB

Published:

Updated: 2025-09-29T14:48:57.508Z

Reserved: 2025-09-27T05:26:44.839Z

Link: CVE-2025-11091

cve-icon Vulnrichment

Updated: 2025-09-29T14:48:45.463Z

cve-icon NVD

Status : Analyzed

Published: 2025-09-28T02:15:31.430

Modified: 2025-10-03T14:45:31.690

Link: CVE-2025-11091

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2025-09-29T09:29:30Z