CVE-2026-7856
Published: 05 May 2026
Summary
CVE-2026-7856 is a high-severity Improper Restriction of Operations within the Bounds of a Memory Buffer (CWE-119) vulnerability in Dlink Di-8100 Firmware. Its CVSS base score is 7.2 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 28.9th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
Threat & Defense at a Glance
Threat & Defense Details
Likely Mitigating ControlsAI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Managed runtimes used by platform-independent applications (e.g., JVM, CLR) enforce memory safety, preventing most buffer overflows that require direct memory manipulation.
Ongoing control assessments and code testing (static/dynamic analysis, fuzzing) surface memory buffer restriction failures, which are then remediated before release.
Memory protections (e.g., W^X, ASLR) make exploitation of buffer-boundary violations far harder to turn into code execution.
Detects exploitation attempts that produce memory corruption, crashes, or anomalous behavior.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Buffer overflow RCE in authenticated web management interface directly enables T1190 (exploiting the exposed router web app) and T1059.004 (arbitrary command execution on embedded Linux via Unix shell).
NVD Description
A flaw has been found in D-Link DI-8100 16.07.26A1. This affects an unknown part of the file /url_member.asp of the component Web Management Interface. Executing a manipulation of the argument Name can lead to buffer overflow. The attack can be…
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launched remotely. The exploit has been published and may be used.
Deeper analysisAI
CVE-2026-7856 is a buffer overflow vulnerability (CWE-119, CWE-120) affecting the D-Link DI-8100 router on firmware version 16.07.26A1. The issue lies in an unknown part of the /url_member.asp file within the Web Management Interface, where manipulation of the "Name" argument triggers the overflow. Published on 2026-05-05, it carries a CVSS v3.1 base score of 7.2 (AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H).
The vulnerability enables remote exploitation by attackers who possess high privileges, such as administrative access to the Web Management Interface. No user interaction is required, and low attack complexity allows a privileged remote attacker to achieve high impacts on confidentiality, integrity, and availability, potentially leading to arbitrary code execution or system crashes via the buffer overflow.
Advisories referenced in VulDB entries and a GitHub report detail the flaw and include a published exploit that may be used. The D-Link website is also listed as a reference source. No specific patches or mitigations are mentioned in the available details, so practitioners should monitor vendor channels for firmware updates and restrict administrative access to the Web Management Interface.
The exploit's public availability on GitHub heightens the risk for unpatched D-Link DI-8100 devices.
Details
- CWE(s)