Buffer Overflow Vulnerability in D-Link DI-7100G C1 Product
CVE-2025-11338

8.7HIGH

Key Information:

Vendor

D-link
Status
Di-7100g C1
Vendor
CVE Published:
6 October 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-11338?

A vulnerability has been identified in the D-Link DI-7100G C1 router that allows for remote exploitation through a buffer overflow in the jhttpd component. The flaw exists within the function sub_4C0990 of the /webchat/login.cgi file, where improper handling of the 'openid' parameter can be exploited by an attacker. This critical oversight could allow malicious actors to execute arbitrary code or disrupt service, making it imperative for users to address this issue promptly. Users are encouraged to look for patches or updated versions to mitigate the risk associated with this vulnerability.

Affected Version(s)

DI-7100G C1 20250928

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-2025-11338 - Proof of Concept

References

https://vuldb.com/?id.327221
vdb-entrytechnical-description
https://vuldb.com/?ctiid.327221
signaturepermissions-required
https://vuldb.com/?submit.664619
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

sheratan (VulDB User)
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