CVE-2026-6014
Published: 10 April 2026
Summary
CVE-2026-6014 is a high-severity Improper Restriction of Operations within the Bounds of a Memory Buffer (CWE-119) vulnerability in Dlink Dir-513 Firmware. Its CVSS base score is 8.8 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 30.8th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
The strongest mitigations our analysis identified are NIST 800-53 SA-22 (Unsupported System Components) and SI-10 (Information Input Validation).
Threat & Defense at a Glance
Threat & Defense Details
Mitigating Controls (NIST 800-53 r5)AI
Directly mitigates the buffer overflow by requiring validation of the 'webpage' argument in POST requests to /goform/formAdvanceSetup to ensure bounds are not exceeded.
Provides runtime memory protections such as stack canaries, ASLR, and DEP to prevent successful exploitation of the buffer overflow vulnerability.
Prohibits use of the unsupported D-Link DIR-513 version 1.10 lacking patches, directly addressing the end-of-life status and unpatchable nature of the flaw.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Buffer overflow in public-facing router web interface (formAdvanceSetup POST handler) directly enables remote exploitation for initial access and RCE.
NVD Description
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…
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attack remotely. The exploit has been published and may be used. This vulnerability only affects products that are no longer supported by the maintainer.
Deeper analysisAI
CVE-2026-6014, published on 2026-04-10, is a buffer overflow vulnerability in D-Link DIR-513 router version 1.10. The issue affects the formAdvanceSetup function in the /goform/formAdvanceSetup file of the POST Request Handler component, triggered by manipulation of the "webpage" argument. It is remotely exploitable and carries a CVSS v3.1 base score of 8.8 (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H), with associated CWEs-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer) and CWE-120 (Buffer Copy without Checking Size of Input).
Attackers with network access can exploit this vulnerability remotely with low complexity and low privileges required, such as an authenticated user, without needing user interaction. Successful exploitation enables high-impact compromise, including unauthorized disclosure of information, modification of data, and denial of service, potentially leading to full control over the affected device.
The vulnerability impacts products no longer supported by the maintainer, meaning no official patches or firmware updates are available. Advisories on VulDB (e.g., https://vuldb.com/vuln/356570) and a detailed write-up at https://lavender-bicycle-a5a.notion.site/D-Link-DIR-513-formAdvanceSetup-33153a41781f80829d47ec9b86dd8abf provide analysis, while the D-Link site (https://www.dlink.com/) offers general support context. An exploit has been publicly released, increasing the risk for unpatched legacy deployments.
Details
- CWE(s)