#VU111984 Stack-based buffer overflow in DIR-816 - CVE-2025-5622

Vulnerability identifier: #VU111984

Vulnerability risk: High

CVSSv4.0: 8.9 [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/U:Amber]

CVE-ID: CVE-2025-5622

CWE-ID: CWE-121

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
DIR-816
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vendor: D-Link

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error in the "wirelessApcli_5g" function in /goform/wirelessApcli_5g file. A remote unauthenticated attacker can trigger stack-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

DIR-816: 1.10CNB05

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External links
https://github.com/wudipjq/my_vuln/blob/main/D-Link5/vuln_50/50.md
https://github.com/wudipjq/my_vuln/blob/main/D-Link5/vuln_50/50.md
https://vuldb.com/?ctiid.311108
https://vuldb.com/?id.311108
https://vuldb.com/?submit.589222
https://www.dlink.com/
https://supportannouncement.us.dlink.com/security/publication.aspx?name=SAP10433

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.