Is CVE-2026-7856 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-7856 being exploited in the wild.

How severe is CVE-2026-7856?

High severity, with a CVSS score of 7.2, published 5 May 2026.

Is there a fix for CVE-2026-7856?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-7856 attacked?

It is attacked over the network, in a network appliance.

Am I affected by CVE-2026-7856?

Check whether you run Dlink Di-8100 or Dlink Di-8100 Firmware. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-7856: D-Link DI-8100 stack buffer overflow in url_member.asp

CVE-2026-7856 · Severity: high · CVSS 7.2 · Published 2026-05-05

A security vulnerability exists in the D-Link DI-8100 router, a device used to manage internet connectivity for small businesses and homes. An attacker with administrative access can send a specially crafted request to the router's management interface to cause a system crash or potentially take full control of the device. This could lead to a total loss of internet availability or allow an attacker to intercept network traffic.

Technologies: Dlink Di-8100, Dlink Di-8100 Firmware. Vendors: Dlink.

Quick answers

Is CVE-2026-7856 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-7856 being exploited in the wild.
How severe is CVE-2026-7856?: High severity, with a CVSS score of 7.2, published 5 May 2026.
Which products and versions are affected?: D-Link DI-8100 16.07.26A1.
Is there a fix for CVE-2026-7856?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-7856 attacked?: It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-7856?: Check whether you run Dlink Di-8100 or Dlink Di-8100 Firmware. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A stack-based buffer overflow (CWE-121) exists in the D-Link DI-8100 firmware version 16.07.26A1. The vulnerability is located within the Web Management Interface in the /url_member.asp component. An authenticated attacker can trigger the overflow by supplying an excessively long string to the 'Name' argument during an 'add' operation. Because the application copies this input into a fixed-size stack buffer without adequate length validation, it results in memory corruption. This can be leveraged to cause a process crash (Denial of Service) or potentially achieve Remote Code Execution (RCE). While the attack is reachable over the network, it requires high privileges (administrative authentication).

Affected products

D-Link DI-8100 16.07.26A1

Timeline

2026-05-05: disclosed: Initial disclosure and publication of CVE-2026-7856
2026-05-05: advisory

References

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