Stack-based Buffer Overflow in D-Link DIR-505 TFTP Upload Filename Handler
CVE-2026-120189

10CRITICAL

Key Information:

Vendor

D-link
Status
Dir-505
Vendor
CVE Published:
1 November 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-120189?

A stack-based buffer overflow vulnerability exists in the TFTP Upload Filename Handler of D-Link DIR-505 firmware version 1.10B02. This security flaw can be exploited remotely, potentially allowing unauthorized access or control over affected devices. Attackers may execute specially crafted inputs to trigger this vulnerability, which has been documented and exploits for it are publicly accessible. It's crucial for users of the DIR-505 to update their firmware and implement security measures to mitigate the risks associated with this vulnerability.

Affected Version(s)

DIR-505 1.10B02

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-2026-120189 - Proof of Concept

References

https://vuldb.com/vuln/429528
vdb-entrytechnical-description
https://vuldb.com/vuln/429528/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-120189
third-party-advisory

CVSS V4

Score:
10
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

Walnut1337 (VulDB User)
.