CVE-2026-4903
Stack-Based Buffer Overflow in Tenda AC5 POST Handler
Publication date: 2026-03-26
Last updated on: 2026-03-31
Assigner: VulDB
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| tenda | ac5_firmware | 15.03.06.47 |
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-787 | The product writes data past the end, or before the beginning, of the intended buffer. |
| 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 flaw found in the Tenda AC5 router firmware version 15.03.06.47. It exists in the function formQuickIndex within the /goform/QuickIndex file, specifically in the POST Request Handler component. The issue arises from improper handling of the PPPOEPassword argument, which can lead to a stack-based buffer overflow. This means that an attacker can send specially crafted data remotely to overflow the buffer and potentially execute arbitrary code or cause the device to crash.
How can this vulnerability impact me? :
The vulnerability can be exploited remotely without user interaction, allowing an attacker with low privileges to cause a stack-based buffer overflow. This can lead to severe impacts such as remote code execution, denial of service, or complete compromise of the affected device. As a result, attackers could gain unauthorized control over the router, intercept or manipulate network traffic, or disrupt network availability.