Buffer Overflow Vulnerability in D-Link DI-8100 Router
CVE-2026-7854

9.3CRITICAL

Key Information:

Vendor

D-link
Status
Di-8100
Vendor
CVE Published:
5 May 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-7854?

A buffer overflow vulnerability has been identified in the D-Link DI-8100 router, specifically within the url_rule_asp function located in the /url_rule.asp file of the POST Parameter Handler. This vulnerability allows attackers to manipulate input parameters that could potentially lead to unauthorized remote access. The issue has been publicly disclosed, raising concerns about its exploitation potential by malicious actors.

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-2026-7854 - Proof of Concept

References

https://vuldb.com/vuln/361131
vdb-entrytechnical-description
https://vuldb.com/vuln/361131/cti
signaturepermissions-required
https://vuldb.com/submit/807838
third-party-advisory

CVSS V4

Score:
9.3
Severity:
CRITICAL
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

draw (VulDB User)
.