CVE-2026-4181 | A security flaw has been discovered in D-Link DIR-816 1.10CN… | CVSS 9.8 CRITICAL

Description

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.

Metadata

CVE ID: CVE-2026-4181
State: PUBLISHED
Assigner: VulDB
Reserved: 2026-03-14 21:56 UTC
Published: 2026-03-15 16:02 UTC
Last updated: 2026-03-16 14:40 UTC
Primary CWE: CWE-121
Stack-based Buffer Overflow
Vendor / Product: D-Link / DIR-816
Sources: cve.org · NVD

Severity & Metrics

9.8 CRITICAL CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R

SSVC — CISA Coordinator

Exploitation: PoC
Automatable: no
Tech. Impact: partial

Affected products (1)

Vendor	Product	Platform	Versions
D-Link	DIR-816	—	1.10CNB05

Weakness (CWE)

CWE	Source	Description
CWE-119	cna	Memory Corruption
CWE-121	cna	Stack-based Buffer Overflow

CVSS scores (4)

Score	Severity	Version	Source	Vector
10.0	N/D	2.0	cna	AV:N/AC:L/Au:N/C:C/I:C/A:C/E:POC/RL:ND/RC:UR
9.8	CRITICAL	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R
9.8	CRITICAL	3.0	cna	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R
9.3	CRITICAL	4.0	cna	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

References (5)

VDB-351085 | D-Link DIR-816 goahead form2RepeaterStep2.cgi stack-based overflow https://vuldb.com/?id.351085
VDB-351085 | CTI Indicators (IOB, IOC, IOA) https://vuldb.com/?ctiid.351085
Submit #769829 | D-Link DIR816 1.10CNB05 Stack-based Buffer Overflow https://vuldb.com/?submit.769829
https://github.com/wudipjq/my_vuln/blob/main/D-Link7/vuln_85/85.md
https://www.dlink.com/