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

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.2% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2026-03-16 · updated 2026-06-17
Weakness: CWE-119

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.

Affected products

D-Link DIR-816: 1.10cnb05

References

https://github.com/wudipjq/my_vuln/blob/main/D-Link7/vuln_85/85.md
https://vuldb.com/?ctiid.351085
https://vuldb.com/?id.351085
https://vuldb.com/?submit.769829
https://www.dlink.com/

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