CVE-2025-8940

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2025-8940
A vulnerability was identified in Tenda AC20 up to 16.03.08.12. Affected by this vulnerability is the function strcpy of the file /goform/saveParentControlInfo. The manipulation of the argument Time leads to buffer overflow. The attack can be launched remotely. The exploit has been disclosed to the public and may be used.

8.8 /10

CVSS v3 : HIGH

V3 Legend

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

V2 Legend

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/lin-3-start/lin-cve/blob/main/Tenda%20AC20-2/Tenda%20AC20-2.md Exploit Third Party Advisory
https://github.com/lin-3-start/lin-cve/blob/main/Tenda%20AC20-2/Tenda%20AC20-2.md#poc Exploit Third Party Advisory
https://vuldb.com/?ctiid.319903 Permissions Required VDB Entry
https://vuldb.com/?id.319903 Third Party Advisory VDB Entry
https://vuldb.com/?submit.631836 Third Party Advisory VDB Entry
https://www.tenda.com.cn/ Product
https://github.com/lin-3-start/lin-cve/blob/main/Tenda%20AC20-2/Tenda%20AC20-2.md Exploit Third Party Advisory
Configurations

Configuration 1 (hide)

AND
cpe:2.3:o:tenda:ac20_firmware:*:*:*:*:*:*:*:*
cpe:2.3:h:tenda:ac20:-:*:*:*:*:*:*:*
History

19 Aug 2025, 18:42

Type Values Removed Values Added
First Time Tenda ac20
Tenda
Tenda ac20 Firmware
References () https://github.com/lin-3-start/lin-cve/blob/main/Tenda%20AC20-2/Tenda%20AC20-2.md - () https://github.com/lin-3-start/lin-cve/blob/main/Tenda%20AC20-2/Tenda%20AC20-2.md - Exploit, Third Party Advisory
References () https://github.com/lin-3-start/lin-cve/blob/main/Tenda%20AC20-2/Tenda%20AC20-2.md#poc - () https://github.com/lin-3-start/lin-cve/blob/main/Tenda%20AC20-2/Tenda%20AC20-2.md#poc - Exploit, Third Party Advisory
References () https://vuldb.com/?ctiid.319903 - () https://vuldb.com/?ctiid.319903 - Permissions Required, VDB Entry
References () https://vuldb.com/?id.319903 - () https://vuldb.com/?id.319903 - Third Party Advisory, VDB Entry
References () https://vuldb.com/?submit.631836 - () https://vuldb.com/?submit.631836 - Third Party Advisory, VDB Entry
References () https://www.tenda.com.cn/ - () https://www.tenda.com.cn/ - Product
CPE cpe:2.3:o:tenda:ac20_firmware:*:*:*:*:*:*:*:*
cpe:2.3:h:tenda:ac20:-:*:*:*:*:*:*:*

15 Aug 2025, 13:15

Type Values Removed Values Added
References () https://github.com/lin-3-start/lin-cve/blob/main/Tenda%20AC20-2/Tenda%20AC20-2.md - () https://github.com/lin-3-start/lin-cve/blob/main/Tenda%20AC20-2/Tenda%20AC20-2.md -

14 Aug 2025, 13:11

Type Values Removed Values Added
Summary
  • (es) Se identificó una vulnerabilidad en Tenda AC20 hasta la versión 16.03.08.12. Esta vulnerabilidad afecta a la función strcpy del archivo /goform/saveParentControlInfo. La manipulación del argumento Time provoca un desbordamiento del búfer. El ataque puede ejecutarse en remoto. Se ha hecho público el exploit y puede que sea utilizado.

14 Aug 2025, 06:15

Type Values Removed Values Added
New CVE
Information

Published : 2025-08-14 06:15

Updated : 2025-08-19 18:42

NVD link : CVE-2025-8940

Mitre link : CVE-2025-8940

CVE.ORG link : CVE-2025-8940

JSON object : View

Products Affected

tenda

  • ac20
  • ac20_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')