Is CVE-2026-94089 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-94089 being exploited in the wild.

How severe is CVE-2026-94089?

Critical severity, with a CVSS score of 10, published 20 September 2026.

Is there a fix for CVE-2026-94089?

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-2026-94089 attacked?

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

Am I affected by CVE-2026-94089?

Check whether you run D-Link DIR-868L 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-2026-94089: D-Link DIR-868L stack-based buffer overflow in authentication handler

CVE-2026-94089 · Severity: critical · CVSS 10 · Published 2026-09-20

A stack-based buffer overflow vulnerability exists in the D-Link DIR-868L wireless router's web authentication handler that can be exploited remotely without authentication. An attacker can send a specially crafted request with an oversized user ID parameter to crash the router's web server or potentially execute arbitrary code, leading to complete device compromise or denial of service.

Vendors: D-Link.

Quick answers

Is CVE-2026-94089 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-94089 being exploited in the wild.
How severe is CVE-2026-94089?: Critical severity, with a CVSS score of 10, published 20 September 2026.
Which products and versions are affected?: D-Link DIR-868L 2.01b05.
Is there a fix for CVE-2026-94089?: 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-2026-94089 attacked?: It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-94089?: Check whether you run D-Link DIR-868L 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 classic stack-based buffer overflow in the strcpy function within the /webfa_authentication.cgi authentication handler component. An unauthenticated remote attacker can manipulate the "id" URL parameter with a 1864-byte value to overflow the stack buffer, overwriting the saved return address and achieving return-address control. The PoC demonstrates that 1860 filler bytes plus a 4-byte marker triggers a crash at the function epilogue, confirming control of the instruction pointer.

Affected products

D-Link DIR-868L 2.01b05

Timeline

2026-09-20: disclosed: Vulnerability publicly disclosed with proof-of-concept exploit
2026-09-20: advisory: CVE-2026-94089 assigned

References

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