Stack-Based Buffer Overflow in D-Link DI-8100 Router
CVE-2025-4883

8.6HIGH

Key Information:

Vendor

D-link
Status
Di-8100
Vendor
CVE Published:
18 May 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-4883?

A stack-based buffer overflow vulnerability exists in the D-Link DI-8100 router within the ctxz_asp function of the /ctxz.asp file. The vulnerability can be exploited through manipulation of certain arguments, such as def, defTcp, defUdp, defIcmp, and defOther. This flaw enables an attacker to execute remote code, compromising the integrity and security of affected devices. As the exploit is publicly known, immediate action is recommended to secure affected systems.

Affected Version(s)

DI-8100 16.07.26A1

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-2025-4883 - Proof of Concept

References

https://vuldb.com/?id.309436
vdb-entrytechnical-description
https://vuldb.com/?ctiid.309436
signaturepermissions-required
https://vuldb.com/?submit.576392
third-party-advisory

CVSS V4

Score:
8.6
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

huan (VulDB User)
.
CVE-2025-4883 : Stack-Based Buffer Overflow in D-Link DI-8100 Router