CVE-2026-7857 Details
Description
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.
A stack-based buffer overflow vulnerability has been identified in the D-Link DI-8100 router, specifically in the web management interface of devices running firmware version 16.07.26A1. The issue arises in the CGI handler processing the '/user_group.asp' endpoint, where the 'sprintf' function is used to concatenate user-supplied parameters into a fixed-size stack buffer without proper bounds checking. This vulnerability can be exploited remotely by sending a crafted HTTP POST request with an overly long string in the 'attr' parameter, allowing an authenticated attacker to overflow the buffer, corrupt the stack, and potentially execute arbitrary code remotely, depending on the memory layout and payload construction.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed May 5, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/draw-ctf/report/blob/main/DI-8100/user_group_asp_overflow.md | [email protected] | ExploitThird Party Advisory |
| https://vuldb.com/submit/807853 | [email protected] | Third Party AdvisoryVDB Entry |
| https://vuldb.com/vuln/361134 | [email protected] | Third Party AdvisoryVDB Entry |
| https://vuldb.com/vuln/361134/cti | [email protected] | Permissions RequiredVDB Entry |
| https://www.dlink.com/ | [email protected] | Product |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-119 | Improper Restriction of Operations within the Bounds of a Memory Buffer | [email protected] |
| CWE-120 | Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| dlink di-8100 firmware | 16.07.26a1 |
CPE
Remediation
| |
| dlink di-8100 | All versions |
CPE
Remediation
| |
Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 24, 2026 | CVE Translated | [email protected] |
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| May 6, 2026 | Initial Analysis | [email protected] |
| May 5, 2026 | New CVE Received | [email protected] |