EUVD-2026-12233Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/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:N/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
Lifecycle Timeline
4DescriptionCVE.org
A security flaw has been discovered in D-Link DIR-816 1.10CNB05. This affects an unknown function of the file /goform/form2RepeaterStep2.cgi of the component goahead. The manipulation of the argument key1/key2/key3/key4/pskValue results in stack-based buffer overflow. The attack may be launched remotely. The exploit has been released to the public and may be used for attacks. This vulnerability only affects products that are no longer supported by the maintainer.
AnalysisAI
Critical stack-based buffer overflow vulnerability in the D-Link DIR-816 router (firmware version 1.10CNB05) that allows remote attackers to execute arbitrary code without authentication. A public proof-of-concept exploit is available, and the vulnerability affects end-of-life products no longer supported by D-Link, making this a high-risk issue for organizations still using these devices.
Technical ContextAI
The vulnerability exists in the goahead web server component, specifically in the /goform/form2RepeaterStep2.cgi file. According to the CPE identifier (cpe:2.3:a:d-link:dir-816:*:*:*:*:*:*:*:*), all versions of the DIR-816 router are affected. The root cause is CWE-121 (Stack-based Buffer Overflow), where improper validation of input parameters (key1, key2, key3, key4, and pskValue) allows an attacker to overflow the stack buffer, potentially overwriting return addresses and gaining control of execution flow.
RemediationAI
Since D-Link no longer supports the DIR-816 product line, no official patches will be released. Organizations must immediately replace these devices with supported alternatives. As an emergency mitigation, block external access to the device's web interface and restrict management access to trusted IP addresses only. However, given the critical nature and public exploit availability, device replacement is the only reliable remediation. Check D-Link's official website (https://www.dlink.com/) for recommended replacement models.
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Same weakness CWE-121 – Stack-based Buffer Overflow
View allSame technique Buffer Overflow
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External POC / Exploit Code
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