Stack-Based Buffer Overflow in D-Link DIR-825 HTTP POST Handler
CVE-2025-6291

8.7HIGH

Key Information:

Vendor

D-link

Status
Vendor
CVE Published:
20 June 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-6291?

A stack-based buffer overflow vulnerability exists in the HTTP POST request handler of the D-Link DIR-825 router firmware version 2.03. This flaw allows attackers to exploit the function do_file, potentially leading to remote code execution. Given that this vulnerability affects products that are no longer supported by the vendor, users of the DIR-825 are highly encouraged to upgrade to secure alternatives to mitigate the risk of exploitation.

Affected Version(s)

DIR-825 2.03

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

References

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

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