CVE•Published 2026-03-16•Modified 2026-04-06•1 article on news•6 live references•NVD data

CVE-2026-4181Dlink · Dir-816_firmware

Vulnerability data via NVD (ingested)

CVSS v3.1

9.8

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS percentile

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Weaknesses (CWE)

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer CWE-121Stack-based Buffer Overflow CWE-787Out-of-bounds Write

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.

Timeline

Published 2026-03-16

Modified 2026-04-06

External references

NVD MITRE Exploit-DB GitHub PoC trickest/cve VulnCheck

Search for exposed instances

Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).

Shodan · vuln tag0 hosts

vuln:CVE-2026-4181

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · OS

os:"Dir-816 Firmware"

Hosts Shodan identified as running Dir-816 Firmware.

More intel sources (5)

Shodan report

vuln:CVE-2026-4181

Country / ASN / product breakdown for the vuln query.

Censys

vulnerabilities.cve_id: CVE-2026-4181