# CVE-2026-94089: D-Link DIR-868L Authentication webfa_authentication.cgi strcpy stack-based overflow

> Remote attackers can trigger a stack-based buffer overflow in the authentication handler via crafted credentials, potentially leading to code execution on D-Link DIR-868L routers.

- **Severity:** Critical 10.0 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 20 Sep 2026
- **Updated:** 22 Sep 2026
- **Also known as:** GHSA-pc7v-4cmj-hg88

## What is CVE-2026-94089?

CVE-2026-94089 is a critical memory corruption vulnerability in D-Link DIR-868L, published on 20 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A vulnerability was determined in D-Link DIR-868L 2.01b05. This issue affects the function strcpy of the file /webfa_authentication.cgi of the component Authentication Handler. Executing a manipulation of the argument id/password can lead to stack-based buffer overflow. The attack can be executed remotely. The exploit has been publicly disclosed and may be utilized.

Weakness: CWE-121 (Stack-based Buffer Overflow), CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer)

## Which versions are affected by CVE-2026-94089?


## How do I fix CVE-2026-94089?

No fix has been published for CVE-2026-94089 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-94089 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-94089 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-94089 and fix it if it is affected.

What it is: CVE-2026-94089 is a critical memory corruption vulnerability in D-Link DIR-868L, published on 20 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-94089 exists.

Affected product: D-Link DIR-868L. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-94089/ (Markdown: https://insights.sbomify.com/CVE-2026-94089/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-94089
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-94089
- OSV: https://osv.dev/vulnerability/CVE-2026-94089

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-94089/
Summaries are generated and may contain mistakes; the official description above is the record.