Stack-Based Buffer Overflow in D-Link Network Storage Products
CVE-2026-4212

8.7HIGH

Key Information:

Vendor

D-link
Status
Dns-120
Dnr-202l
Dns-315l
Dns-320
Vendor
CVE Published:
16 March 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-4212?

A vulnerability has been identified in multiple D-Link network storage devices involving a stack-based buffer overflow in the Downloads_Schedule_Info function of the /cgi-bin/download_mgr.cgi file. This issue can be exploited remotely, allowing attackers to manipulate the function and potentially gain unauthorized access. Publicly disclosed exploits may put devices at risk, emphasizing the need for immediate attention and remediation.

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Affected Version(s)

DNR-202L 20260205

DNR-322L 20260205

DNR-326 20260205

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-2026-4212 - Proof of Concept

References

https://vuldb.com/?id.351123
vdb-entrytechnical-description
https://vuldb.com/?ctiid.351123
signaturepermissions-required
https://vuldb.com/?submit.770442
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

pjqwudi (VulDB User)
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