# CVE-2020-8861: Auth bypass in DAP-1330

> Network-adjacent attackers can bypass authentication on D-Link DAP-1330 extenders to execute arbitrary code via improper cookie handling in HNAP requests.

- **Severity:** High 8.8 (`CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 22 Feb 2020
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-c85x-hq3f-wfrq

## What is CVE-2020-8861?

CVE-2020-8861 is a high-severity authentication bypass vulnerability in D-Link DAP-1330, published on 22 Feb 2020. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of D-Link DAP-1330 1.10B01 BETA Wi-Fi range extenders. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of HNAP login requests. The issue results from the lack of proper handling of cookies. An attacker can leverage this vulnerability to execute arbitrary code on the router. Was ZDI-CAN-9554.

Weakness: CWE-287 (Improper Authentication), CWE-303 (Incorrect Implementation of Authentication Algorithm)

## Which versions are affected by CVE-2020-8861?

It affects 1 product.


Products: Dlink Dap-1330 Firmware.

## How do I fix CVE-2020-8861?

No fix has been published for CVE-2020-8861 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-8861 being exploited?

There is no known exploitation of CVE-2020-8861 in the wild and no public exploit code.

## Other vulnerabilities in D-Link DAP-1330

- [CVE-2022-29328](https://insights.sbomify.com/CVE-2022-29328/): Memory corruption in n/a (critical 9.8)
- [CVE-2022-29329](https://insights.sbomify.com/CVE-2022-29329/): Memory corruption in n/a (critical 9.8)
- [CVE-2021-34827](https://insights.sbomify.com/CVE-2021-34827/): Memory corruption in DAP-1330 (high 8.8)
- [CVE-2021-34828](https://insights.sbomify.com/CVE-2021-34828/): Memory corruption in DAP-1330 (high 8.8)
- [CVE-2021-34829](https://insights.sbomify.com/CVE-2021-34829/): Memory corruption in DAP-1330 (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-8861 and fix it if it is affected.

What it is: CVE-2020-8861 is a high-severity authentication bypass vulnerability in D-Link DAP-1330, published on 22 Feb 2020. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2020-8861 in the wild and no public exploit code.

Affected product: D-Link DAP-1330. 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-2020-8861/ (Markdown: https://insights.sbomify.com/CVE-2020-8861/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-8861
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-8861
- OSV: https://osv.dev/vulnerability/CVE-2020-8861

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-8861/
Summaries are generated and may contain mistakes; the official description above is the record.