Stack-Based Buffer Overflow Vulnerability in D-Link DI-8100 Router
CVE-2025-7911

8.7HIGH

Key Information:

Vendor

D-link
Status
Di-8100
Vendor
CVE Published:
20 July 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-7911?

A stack-based buffer overflow vulnerability has been discovered in the D-Link DI-8100 router version 1.0. This issue affects the sprintf function in the /upnp_ctrl.asp file of the jhttpd component. Malicious actors may exploit this vulnerability remotely by manipulating the arguments 'remove_ext_proto' or 'remove_ext_port'. The potential for remote exploitation poses serious security risks, as the exploit is publicly disclosed, allowing attackers to compromise the affected devices.

Affected Version(s)

DI-8100 1.0

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.

CVE-2025-7911 - Proof of Concept

References

https://vuldb.com/?id.317026
vdb-entrytechnical-description
https://vuldb.com/?ctiid.317026
signaturepermissions-required
https://vuldb.com/?submit.618640
third-party-advisory

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

  • Vulnerability Reserved

Credit

bazhuayu (VulDB User)
.
CVE-2025-7911 : Stack-Based Buffer Overflow Vulnerability in D-Link DI-8100 Router