Which versions of Dir 513 are affected by EUVD-2026-21307?

CVE-2026-6012 affects end-of-life D-Link DIR-513 wireless routers, allowing authenticated attackers with low-privilege credentials to execute arbitrary code remotely through a buffer overflow…

Is there a public PoC exploit available for EUVD-2026-21307?

Yes, a public proof-of-concept exploit is available for EUVD-2026-21307. Prioritise patching immediately. EPSS: 0.0%.

How to fix or mitigate EUVD-2026-21307?

Within 24 hours: Inventory all D-Link DIR-513 1.10 devices on the network and isolate or disable any units found. Within 7 days: Implement network segmentation to restrict management access to DIR-513 devices and enforce strong authentication policies to limit credential compromise. Within 30 days: Replace all DIR-513 units with supported router models from an active vendor; if immediate replacement is unavailable, air-gap affected devices or place behind a monitored network boundary with restricted outbound access.

Dir 513 EUVD-2026-21307

Q: What is the CVSS score of EUVD-2026-21307?

EUVD-2026-21307 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-2026-6012 HIGH

Classic Buffer Overflow (CWE-120)

2026-04-10 VulDB

GHSA-x6gx-rmhg-wc3f

Buffer Overflow D-Link Dir 513 D-Link

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

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-2026-21307

Analysis Generated

Apr 10, 2026 - 04:45 vuln.today

CVE Published

Apr 10, 2026 - 04:00 nvd

HIGH 7.4

DescriptionCVE.org

A security vulnerability has been detected in D-Link DIR-513 1.10. This affects the function formSetPassword of the file /goform/formSetPassword of the component POST Request Handler. The manipulation of the argument curTime leads to buffer overflow. The attack is possible to be carried out remotely. The exploit has been disclosed publicly 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 1.10 formSetPassword function allows authenticated remote attackers to achieve arbitrary code execution with high confidentiality, integrity, and availability impact. Exploitation occurs through POST request manipulation of the curTime parameter in /goform/formSetPassword endpoint. This end-of-life product receives no vendor support, and publicly available exploit code exists. Attack requires low-privilege authentication (CVSS PR:L) but no user interaction, enabling straightforward remote exploitation once credentials are obtained.

Technical ContextAI

CWE-120 buffer overflow in formSetPassword POST handler caused by inadequate input validation on curTime parameter. Authenticated attacker (PR:L) sends crafted POST request to /goform/formSetPassword with oversized curTime value, triggering memory corruption. Network-accessible attack surface (AV:N) with low complexity (AC:L) enables reliable remote exploitation without additional conditions.

RemediationAI

No vendor-released patch identified at time of analysis. D-Link DIR-513 is end-of-life with no active support per official vendor communications. Immediately discontinue use of affected devices and replace with current-generation, actively supported hardware from D-Link or alternative vendors. If replacement is not immediately feasible, isolate DIR-513 devices from untrusted networks, disable remote administration interfaces, implement strict firewall rules permitting only essential traffic, and enforce strong unique credentials on all accounts. Monitor device logs for formSetPassword access attempts. Consult vendor advisory at https://www.dlink.com/ and vulnerability details at https://vuldb.com/vuln/356568 for additional context. Permanent hardware replacement is the only long-term mitigation for unsupported platforms.