CVE-2026-7857highCWE-119CWE-120

CVE-2026-7857: high-severity vulnerability in D-Link DI-8100

D-Link DI-8100 CGI user_group.asp sprintf buffer overflow

Published

Follow this CVE+ Monitor DI-8100

E-mail alert when it lands in KEV, gets a public PoC or its score goes up.

41Vexday Risk Score

No sign of exploitation. It has a public proof of concept.

ssvc Attendcvss 8.6epss 4.2%
A vulnerability has been found in D-Link DI-8100 16.07.26A1. This vulnerability affects the function sprintf of the file /user_group.asp of the component CGI Handler. The manipulation leads to buffer overflow. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used.
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P
Affected products
D-Link · DI-8100
⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
Related CVEs — D-Link DI-8100

In the same product, most dangerous first.

CVE-2025-10440MEDIUMD-Link DI-8100/DI-8100G/DI-8200/DI-8200G/DI-8003/DI-8003G jhttpd usb_paswd.asp sub_4621DC os command injectionEPSS 13.4%CVE-2025-3538HIGHD-Link DI-8100 jhttpd auth.asp auth_asp stack-based overflowEPSS 13.2%CVE-2025-4544HIGHD-Link DI-8100 jhttpd ddos.asp stack-based overflowEPSS 11.8%CVE-2025-4883HIGHD-Link DI-8100 Connection Limit Page ctxz.asp ctxz_asp stack-based overflowEPSS 8.9%CVE-2024-7436MEDIUMD-Link DI-8100 msp_info.htm msp_info_htm command injectionEPSS 7.8%CVE-2025-7762HIGHD-Link DI-8100 HTTP Request menu_nat_more.asp stack-based overflowEPSS 6.7%