Which versions of D-Link are affected by EUVD-2026-21310?

CVE-2026-6014 is a high-severity buffer overflow affecting D-Link DIR-513 routers (firmware 1.10) that allows authenticated attackers to execute arbitrary code and fully compromise affected devices.

Is there a public PoC exploit available for EUVD-2026-21310?

Yes, a public proof-of-concept exploit is available for EUVD-2026-21310. Prioritise patching immediately. EPSS: 0.0%.

How to fix or mitigate EUVD-2026-21310?

Within 24 hours: Identify all D-Link DIR-513 devices running firmware 1.10 in your network and document their business function and connectivity. Within 7 days: Implement network segmentation to isolate affected routers from critical systems; restrict administrative access to the /goform/formAdvanceSetup endpoint via firewall rules; consider credential rotation for any accounts with access to these devices. Within 30 days: Develop a replacement plan and execute migration away from DIR-513 hardware to vendor-supported router models with current security patches.

D-Link EUVD-2026-21310

Q: What is the CVSS score of EUVD-2026-21310?

EUVD-2026-21310 has a CVSS 4.0 base score of 7.4 (High). CVSS vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X. EPSS exploitation probability: 0.0%.

| CVE-2026-6014 HIGH

Classic Buffer Overflow (CWE-120)

2026-04-10 VulDB

GHSA-ch75-q946-9j9r

D-Link Buffer Overflow

7.4

CVSS 4.0 · NVD

Severity by source

NVD PRIMARY

7.4 HIGH

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Lifecycle Timeline

PoC Detected

Apr 10, 2026 - 05:16 vuln.today

Public exploit code

EUVD ID Assigned

Apr 10, 2026 - 04:45 euvd

EUVD-2026-21310

Analysis Generated

Apr 10, 2026 - 04:45 vuln.today

CVE Published

Apr 10, 2026 - 04:30 nvd

HIGH 7.4

DescriptionCVE.org

A flaw has been found in D-Link DIR-513 1.10. This issue affects the function formAdvanceSetup of the file /goform/formAdvanceSetup of the component POST Request Handler. This manipulation of the argument webpage causes buffer overflow. It is possible to initiate the attack remotely. The exploit has been published and may be used. This vulnerability only affects products that are no longer supported by the maintainer.

AnalysisAI

Buffer overflow in D-Link DIR-513 firmware 1.10 formAdvanceSetup function enables authenticated remote attackers to achieve arbitrary code execution with high confidentiality, integrity, and availability impact. The vulnerability resides in POST request handling at /goform/formAdvanceSetup endpoint, where insufficient input validation of the 'webpage' parameter triggers memory corruption. Publicly available exploit code exists. This router model is end-of-life with no vendor support.

Technical ContextAI

Classic stack-based buffer overflow (CWE-120) in legacy embedded web server. The formAdvanceSetup handler lacks bounds checking on user-supplied 'webpage' argument during POST processing, allowing authenticated attackers (PR:L) to overwrite adjacent memory regions. Network attack vector with low complexity (AV:N/AC:L) enables remote exploitation without user interaction.

RemediationAI

No vendor-released patch identified at time of analysis. D-Link has discontinued support for DIR-513 hardware, confirmed end-of-life status per vendor documentation at https://www.dlink.com/. Organizations must immediately decommission affected devices and replace with currently supported router models receiving active firmware updates. Temporary risk reduction: restrict administrative interface access to trusted management networks only, disable remote administration features, and implement network segmentation to isolate vulnerable devices. Do not deploy workarounds as permanent solutions-hardware replacement is the only sustainable mitigation for end-of-life network infrastructure. Consult VulDB advisory https://vuldb.com/vuln/356570 for attack surface analysis and technical indicators.