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Vulnerability record · CVE-2026-3978 · published 12 March 2026

CVE-2026-3978: Dlink dir-513 firmware memory buffer overflow vulnerability

Dlink · Dir 513 Firmware

A vulnerability was detected in D-Link DIR-513 1.10. The impacted element is an unknown function of the file /goform/formEasySetupWizard3. The manipulation of the argument wan_connected results in stack-based buffer overflow. The attack can be launched remotely. The exploit is now public and may be used.

7.4 CVSS 4.0 High EPSS 1.2% · top 33.9% CWE-119 · Memory buffer overflowCWE-121 · Stack-based buffer overflow
7.4CVSS 4.0 base score, v2 9.0
1.2%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
5References, 1 tagged exploit
17 Jun 2026Last modified by NVD

Description

A vulnerability was detected in D-Link DIR-513 1.10. The impacted element is an unknown function of the file /goform/formEasySetupWizard3. The manipulation of the argument wan_connected results in stack-based buffer overflow. The attack can be launched remotely. The exploit is now public and may be used.

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:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/Litengzheng/vul_db/blob/main/Dir513/vul_21/README.md ExploitThird Party Advisory
https://vuldb.com/?ctiid.350413 Permissions RequiredVDB Entry
https://vuldb.com/?id.350413 Third Party AdvisoryVDB Entry
https://vuldb.com/?submit.769586 Third Party AdvisoryVDB Entry
https://www.dlink.com/ Product

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2025-70245Dlink dir-513 firmware out-of-bounds write vulnerabilityStack buffer overflow vulnerability in D-Link DIR-513 v1.10 via the curTime parameter to goform/formSetWizardSelectMode.EPSS 0.60%9.8CVE-2025-70232Dlink dir-513 firmware stack-based buffer overflow vulnerabilityStack buffer overflow vulnerability in D-Link DIR-513 v1.10 via the curTime parameter to goform/formSetMACFilter.EPSS 0.63%9.8CVE-2025-70233Dlink dir-513 firmware stack-based buffer overflow vulnerabilityStack buffer overflow vulnerability in D-Link DIR-513 v1.10 via the curTime parameter to goform/formSetEnableWizard.EPSS 0.63%9.8CVE-2025-70229Dlink dir-513 firmware stack-based buffer overflow vulnerabilityStack buffer overflow vulnerability in D-Link DIR-513 v1.10 via the curTime parameter to goform/formSchedule.EPSS 0.63%9.8CVE-2025-70230Dlink dir-513 firmware stack-based buffer overflow vulnerabilityStack buffer overflow vulnerability in D-Link DIR-513 v1.10 via the curTime parameter to goform/formSetDDNS.EPSS 0.78%9.8CVE-2025-70231Dlink dir-513 firmware path traversal vulnerabilityD-Link DIR-513 version 1.10 contains a critical-level vulnerability. When processing POST requests related to verification codes in /goform/formLogin…EPSS 0.66%9.8CVE-2025-70222Dlink dir-513 firmware stack-based buffer overflow vulnerabilityStack buffer overflow vulnerability in D-Link DIR-513 v1.10 via the curTime parameter to goform/formLogin,goform/getAuthCode.EPSS 0.49%9.8CVE-2025-70221Dlink dir-513 firmware stack-based buffer overflow vulnerabilityStack buffer overflow vulnerability in D-Link DIR-513 v1.10 via the curTime parameter to goform/formLogin.EPSS 0.49%

Source: NIST National Vulnerability Database (record CVE-2026-3978), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.