# CVE-2021-42627: Missing authorization in n/a

> Unauthenticated attackers can access the WAN configuration page to view and modify network settings on D-Link DIR-615 routers.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/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:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 23 Aug 2022
- **Updated:** 9 Jul 2026
- **Also known as:** GHSA-v9x5-7566-775w

## What is CVE-2021-42627?

CVE-2021-42627 is a critical missing authorization vulnerability in n/a, published on 23 Aug 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The WAN configuration page "wan.htm" on D-Link DIR-615 devices with firmware 20.06 can be accessed directly without authentication which can lead to disclose the information about WAN settings and also leverage attacker to modify the data fields of page.

## Which versions are affected by CVE-2021-42627?

It affects 4 products.


Products: Dlink Dir-615 Firmware, Dlink Dir-615 J1 Firmware, Dlink Dir-615 T1 Firmware, Dlink Dir-615jx10 Firmware.

## How do I fix CVE-2021-42627?

No fix has been published for CVE-2021-42627 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-42627 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-42627 exists.

Public exploit code:

- D-Link DIR-615 - Unauthorized Access (nuclei): http/cves/2021/CVE-2021-42627.yaml

## Other vulnerabilities in n/a

- [CVE-2021-37388](https://insights.sbomify.com/CVE-2021-37388/): Memory corruption in n/a (critical 9.8)
- [CVE-2018-15839](https://insights.sbomify.com/CVE-2018-15839/): Memory corruption in n/a (critical 9.8)
- [CVE-2019-17525](https://insights.sbomify.com/CVE-2019-17525/): Security feature bypass in n/a (high 8.8)
- [CVE-2026-2151](https://insights.sbomify.com/CVE-2026-2151/): D-Link DIR-615 DMZ Host Feature adv_firewall.php os command injection (high 8.6)
- [CVE-2026-2152](https://insights.sbomify.com/CVE-2026-2152/): D-Link DIR-615 Web Configuration adv_routing.php os command injection (high 8.6)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-42627 and fix it if it is affected.

What it is: CVE-2021-42627 is a critical missing authorization vulnerability in n/a, published on 23 Aug 2022. 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-2021-42627 exists.

Affected product: n/a. 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-2021-42627/ (Markdown: https://insights.sbomify.com/CVE-2021-42627/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-42627
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-42627
- OSV: https://osv.dev/vulnerability/CVE-2021-42627

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-42627/
Summaries are generated and may contain mistakes; the official description above is the record.