CVE-2025-11091

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.

CVSS v3 8.8 HIGH
CVSS v2.0 9.0 HIGH

8.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

9.0^/10

CVSS v2.0 : HIGH

Vector : AV:N/AC:L/Au:S/C:C/I:C/A:C

Exploitability : 8.0 / Impact : 10.0

Access Vector NETWORK

Access Complexity LOW

Authentication SINGLE

Confidentiality Impact COMPLETE

Integrity Impact COMPLETE

Availability Impact COMPLETE

References

Link	Resource
https://github.com/maximdevere/CVE2/issues/2	Exploit Issue Tracking
https://vuldb.com/?ctiid.326173	Permissions Required VDB Entry
https://vuldb.com/?id.326173	Third Party Advisory VDB Entry
https://vuldb.com/?submit.661806	Third Party Advisory VDB Entry
https://www.tenda.com.cn/	Product
https://github.com/maximdevere/CVE2/issues/2	Exploit Issue Tracking

Configurations

Configuration 1 (hide)

AND

cpe:2.3:o:tenda:ac21_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:tenda:ac21:-:*:*:*:*:*:*:*

History

09 Oct 2026, 10:10

Type	Values Removed	Values Added
Summary		(es) Una falla de seguridad ha sido descubierta en Tenda AC21 hasta 16.03.08.16. Afectada por esta vulnerabilidad está la función sscanf del archivo /goform/SetStaticRouteCfg. La manipulación de la lista de argumentos resulta en desbordamiento de búfer. El ataque puede ser lanzado remotamente. El exploit ha sido lanzado al público y puede ser explotado.

Information

Published : 2025-09-28 02:15

Updated : 2026-10-09 10:10

NVD link : CVE-2025-11091

Mitre link : CVE-2025-11091

CVE.ORG link : CVE-2025-11091

JSON object : View

Products Affected

tenda

ac21
ac21_firmware

CWE

CWE-119

Improper Restriction of Operations within the Bounds of a Memory Buffer

CWE-120

Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

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