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High severity · published Mar 12, 2026
CVE-2026-3978
D-Link DIR-513 formEasySetupWizard3 stack-based overflow
8.8
CVSS
0.7%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 54% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DI
DIR-513 · D-Link
1.10 · source: vendor
DF
Dir-513 Firmware · Dlink
1.10 · source: NVD
Affected product
DI
DIR-513
D-Link
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-3978
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-3978
Exploit
https://github.com/Litengzheng/vul_db/blob/main/Dir513/vul_21/README.md
Permissions Required
https://vuldb.com/?ctiid.350413
Third Party Advisory
https://vuldb.com/?id.350413
Third Party Advisory
https://vuldb.com/?submit.769586
Product
https://www.dlink.com/
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