CVE-2025-6291
BaseFortify
Publication date: 2025-06-20
Last updated on: 2025-06-26
Assigner: VulDB
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| dlink | dir-825_firmware | 2.03 |
| dlink | dir-825 | * |
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?
CVE-2025-6291 is a critical stack-based buffer overflow vulnerability in the D-Link DIR-825 router version 2.03. It exists in the HTTP POST Request Handler's function do_file. An attacker can exploit this by sending a specially crafted HTTP POST request that manipulates input, causing a stack buffer overflow. This overflow can overwrite memory on the stack, potentially leading to arbitrary code execution or device compromise. The vulnerability is remotely exploitable without authentication and is considered easy to exploit. [1]
How can this vulnerability impact me? :
This vulnerability can impact you by compromising the confidentiality, integrity, and availability of the affected D-Link DIR-825 router. Since it is remotely exploitable without authentication, an attacker can take control of the device, disrupt its operation, or use it as a foothold within your network. The exploit is publicly available and easy to use, increasing the risk of attack. Because the product is no longer supported, no mitigations exist, so the recommended action is to replace the device. [1]
How can this vulnerability be detected on my network or system? Can you suggest some commands?
This vulnerability can be detected by monitoring for specially crafted HTTP POST requests targeting the do_file function of the D-Link DIR-825 router's HTTP POST Request Handler. Since the exploit involves sending manipulated input in HTTP POST requests, network traffic analysis tools like Wireshark or tcpdump can be used to capture and inspect POST requests to the router. However, no specific detection commands or signatures are provided. You may use commands such as 'tcpdump -i <interface> tcp port 80 and tcp[((tcp[12:1] & 0xf0) >> 2):4] = 0x504f5354' to filter HTTP POST requests, then analyze payloads for suspicious patterns. Additionally, checking for unusual router behavior or crashes may indicate exploitation attempts. [1]
What immediate steps should I take to mitigate this vulnerability?
Immediate mitigation steps include replacing the affected D-Link DIR-825 router with an alternative device, as no known countermeasures or patches exist for this vulnerability. Since the product is no longer supported and the vulnerability is remotely exploitable without authentication, discontinuing use of the affected device is strongly recommended to prevent exploitation. [1]