Critical 9.8Published Mar 15, 2026

CVE-2026-4181D-Link DIR-816 goahead form2RepeaterStep2.cgi stack-based overflow

Updated under an hour ago (Oct 26, 2026, 6:40 AM ET)

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It affects D-Link DIR-816 and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for D-Link DIR-816

Exploited in the last 30 days

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.

CVSS: 9.8 CRITICAL (v3.1, 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
Weakness (CWE): CWE-121, CWE-119
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulDB
NVD analysis: Analyzed
Record last updated: Mar 16, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

D-Link DIR-816 d_link:dir_816 (from the name)	1.10CNB05	CNA record
dlink dir-816_firmware dlink:dir-816_firmware	1.10cnb05	NVD

References

https://vuldb.com/?id.351085vdb-entry, technical-description, third-party-advisory
https://vuldb.com/?ctiid.351085signature, permissions-required, vdb-entry
https://vuldb.com/?submit.769829third-party-advisory, vdb-entry
https://github.com/wudipjq/my_vuln/blob/main/D-Link7/vuln_85/85.mdexploit, third-party-advisory
https://www.dlink.com/product

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.