CVE-2026-7851 D-Link DI-8100 yyxz.asp sprintf stack-based overflow
Remote attackers can trigger a stack-based buffer overflow in the DI-8100 router via the ID parameter, potentially leading to arbitrary code execution.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-7851?
CVE-2026-7851 is a high-severity memory corruption vulnerability in D-Link DI-8100, published on 5 May 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
A vulnerability was identified in D-Link DI-8100 16.07.26A1. This affects the function sprintf of the file yyxz.asp. The manipulation of the argument ID leads to stack-based buffer overflow. The attack is possible to be carried out remotely. The exploit is publicly available and might be used.
Which versions are affected by CVE-2026-7851?
It affects 1 product.
Products include Dlink Di-8100 Firmware.
How do I fix CVE-2026-7851?
No fix has been published for CVE-2026-7851 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-7851 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-7851 exists.
Other vulnerabilities in D-Link DI-8100
- CVE-2025-44083 Auth bypass in n/a
- CVE-2026-7853 D-Link DI-8100 HTTP auto_reboot.asp sprintf buffer overflow
- CVE-2026-7854 D-Link DI-8100 POST Parameter url_rule.asp url_rule_asp buffer overflow
- CVE-2026-7248 D-Link DI-8100 CGI Endpoint tgfile.htm tgfile_htm buffer overflow
- CVE-2026-7855 D-Link DI-8100 HTTP Request tggl.asp tggl_asp buffer overflow
Sources
Also known as GHSA-x4pj-ppv6-g6w7.