CVE-2026-1637

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-1637
A vulnerability was identified in Tenda AC21 16.03.08.16. The affected element is the function fromAdvSetMacMtuWan of the file /goform/AdvSetMacMtuWan. The manipulation leads to stack-based buffer overflow. Remote exploitation of the attack is possible. The exploit is publicly available and might 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/LX-LX88/cve/issues/25 Broken Link
https://vuldb.com/?ctiid.343416 Permissions Required VDB Entry
https://vuldb.com/?id.343416 Third Party Advisory VDB Entry
https://vuldb.com/?submit.740865 Third Party Advisory VDB Entry
https://www.tenda.com.cn/ Product
https://github.com/LX-LX88/cve/issues/25 Broken Link
Configurations

Configuration 1 (hide)

AND
cpe:2.3:o:tenda:ac21_firmware:16.03.08.16:*:*:*:*:*:*:*
cpe:2.3:h:tenda:ac21:-:*:*:*:*:*:*:*
History

10 Feb 2026, 15:13

Type Values Removed Values Added
CPE cpe:2.3:o:tenda:ac21_firmware:16.03.08.16:*:*:*:*:*:*:*
cpe:2.3:h:tenda:ac21:-:*:*:*:*:*:*:*
References () https://github.com/LX-LX88/cve/issues/25 - () https://github.com/LX-LX88/cve/issues/25 - Broken Link
References () https://vuldb.com/?ctiid.343416 - () https://vuldb.com/?ctiid.343416 - Permissions Required, VDB Entry
References () https://vuldb.com/?id.343416 - () https://vuldb.com/?id.343416 - Third Party Advisory, VDB Entry
References () https://vuldb.com/?submit.740865 - () https://vuldb.com/?submit.740865 - Third Party Advisory, VDB Entry
References () https://www.tenda.com.cn/ - () https://www.tenda.com.cn/ - Product
First Time Tenda
Tenda ac21
Tenda ac21 Firmware

02 Feb 2026, 17:16

Type Values Removed Values Added
References () https://github.com/LX-LX88/cve/issues/25 - () https://github.com/LX-LX88/cve/issues/25 -
Summary
  • (es) Una vulnerabilidad fue identificada en Tenda AC21 16.03.08.16. El elemento afectado es la función fromAdvSetMacMtuWan del archivo /goform/AdvSetMacMtuWan. La manipulación conduce a un desbordamiento de búfer basado en pila. La explotación remota del ataque es posible. El exploit está disponible públicamente y podría ser utilizado.

29 Jan 2026, 23:16

Type Values Removed Values Added
New CVE
Information

Published : 2026-01-29 23:16

Updated : 2026-02-10 15:13

NVD link : CVE-2026-1637

Mitre link : CVE-2026-1637

CVE.ORG link : CVE-2026-1637

JSON object : View

Products Affected

tenda

  • ac21
  • ac21_firmware
CWE
CWE-119

Improper Restriction of Operations within the Bounds of a Memory Buffer

CWE-121

Stack-based Buffer Overflow