CVE-2026-1637
Stack-Based Buffer Overflow in Tenda AC21 Remote Exploitable
Publication date: 2026-01-29
Last updated on: 2026-02-10
Assigner: VulDB
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| tenda | ac21_firmware | 16.03.08.16 |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-119 | The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data. |
| CWE-121 | A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability is a stack-based buffer overflow in the function fromAdvSetMacMtuWan of the Tenda AC21 router firmware version 16.03.08.16. It occurs due to improper handling of input, allowing an attacker to overwrite memory on the stack. The vulnerability can be exploited remotely, and an exploit is publicly available.
How can this vulnerability impact me? :
Exploitation of this vulnerability can lead to remote code execution or denial of service on the affected device. This means an attacker could potentially take control of the router, disrupt network connectivity, or compromise the security of the network traffic passing through the device.