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.

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/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

No history.

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_firmware
ac21

CWE

CWE-119

Improper Restriction of Operations within the Bounds of a Memory Buffer

CWE-121

Stack-based Buffer Overflow

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