Is CVE-2026-90880 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-90880 being exploited in the wild.

How severe is CVE-2026-90880?

High severity, with a CVSS score of 7.4, published 15 September 2026.

Which products and versions are affected?

D-Link DSL-3782 from 2016-07-28 firmware.

Is there a fix for CVE-2026-90880?

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.

Am I affected by CVE-2026-90880?

Check whether you run D-Link DSL-3782 at an affected version. 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-2026-90880: D-Link DSL-3782 command injection in Diagnostics

CVE-2026-90880 · Severity: high · CVSS 7.4 · Published 2026-09-15

D-Link DSL-3782 is a router/DSL gateway device used to provide internet connectivity in homes and small businesses. A vulnerability in the Diagnostics web interface allows authenticated users to inject arbitrary shell commands via the address parameter, leading to full compromise of the device including credential theft, traffic interception, and persistent backdoor installation.

Vendors: D-Link.

Quick answers

Is CVE-2026-90880 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-90880 being exploited in the wild.
How severe is CVE-2026-90880?: High severity, with a CVSS score of 7.4, published 15 September 2026.
Which products and versions are affected?: D-Link DSL-3782 from 2016-07-28 firmware.
Is there a fix for CVE-2026-90880?: 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.
Am I affected by CVE-2026-90880?: Check whether you run D-Link DSL-3782 at an affected version. 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

The vulnerability is a command injection flaw in the /cgi-bin/New_GUI/Set/Diagnostics.asp endpoint. The Addr parameter, intended for ping/traceroute diagnostics, is passed unsanitized into a system() call without input validation or shell-escaping. An authenticated attacker can inject shell metacharacters (e.g., semicolons, pipes) to execute arbitrary commands with root privileges. The attack vector is network-based and requires prior authentication; exploitation has been demonstrated via proof-of-concept. The root cause is the lack of input validation and use of system() instead of safer alternatives like exec* family functions. Patches or vendor guidance are not yet publicly available.

Affected products

D-Link DSL-3782 from 2016-07-28 firmware

Timeline

2026-09-15: disclosed: CVE-2026-90880 published to NVD
2026-07-05: other: Vulnerability discovered via autonomous dynamic analysis and confirmed via file_write_canary oracle
2026-08-14: other: Disclosure draft prepared for D-Link PSIRT; status marked as DRAFT for submission

References

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