CVE-2025-9791

A weakness has been identified in Tenda AC20 16.03.08.05. This vulnerability affects unknown code of the file /goform/fromAdvSetMacMtuWan. This manipulation of the argument wanMTU causes stack-based buffer overflow. Remote exploitation of the attack is possible. The exploit has been made available to the public and could 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/Cpppq43/Tenda/blob/main/Tenda_AC20_V16.03.08.05.md	Exploit Third Party Advisory
https://github.com/Cpppq43/Tenda/blob/main/Tenda_AC20_V16.03.08.05.md#poc	Exploit Third Party Advisory
https://vuldb.com/?ctiid.322106	Permissions Required VDB Entry
https://vuldb.com/?id.322106	Third Party Advisory VDB Entry
https://vuldb.com/?submit.641088	Third Party Advisory VDB Entry
https://www.tenda.com.cn/	Product
https://github.com/Cpppq43/Tenda/blob/main/Tenda_AC20_V16.03.08.05.md	Exploit Third Party Advisory
https://github.com/Cpppq43/Tenda/blob/main/Tenda_AC20_V16.03.08.05.md#poc	Exploit Third Party Advisory

Configurations

Configuration 1 (hide)

AND

cpe:2.3:o:tenda:ac20_firmware:16.03.08.5:*:*:*:*:*:*:*

cpe:2.3:h:tenda:ac20:-:*:*:*:*:*:*:*

History

No history.

Information

Published : 2025-09-01 19:15

Updated : 2025-09-04 16:20

NVD link : CVE-2025-9791

Mitre link : CVE-2025-9791

CVE.ORG link : CVE-2025-9791

JSON object : View

Products Affected

tenda

ac20
ac20_firmware

CWE

CWE-119

Improper Restriction of Operations within the Bounds of a Memory Buffer

CWE-121

Stack-based Buffer Overflow

CWE-787

Out-of-bounds Write

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