# CVE-2022-30521: Memory corruption in n/a

> Attackers can execute arbitrary code on D-Link DIR-890L routers by sending a specially crafted payload to the web interface due to a stack-based buffer overflow.

- **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:** 27 May 2022
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-37gv-mrx7-gfqg

## What is CVE-2022-30521?

CVE-2022-30521 is a critical memory corruption vulnerability in n/a, published on 27 May 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The LAN-side Web-Configuration Interface has Stack-based Buffer Overflow vulnerability in the D-Link Wi-Fi router firmware DIR-890L DIR890LA1_FW107b09.bin and previous versions. The function created at 0x17958 of /htdocs/cgibin will call sprintf without checking the length of strings in parameters given by HTTP header and can be controlled by users easily. The attackers can exploit the vulnerability to carry out arbitrary code by means of sending a specially constructed payload to port 49152.

Weakness: CWE-787 (Out-of-bounds Write)

## Which versions are affected by CVE-2022-30521?

It affects 1 product.


Products: Dlink Dir-890l Firmware.

## How do I fix CVE-2022-30521?

No fix has been published for CVE-2022-30521 yet. Limit exposure of the affected software until one is available.

## Is CVE-2022-30521 being exploited?

There is no known exploitation of CVE-2022-30521 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2022-29778](https://insights.sbomify.com/CVE-2022-29778/): Hardcoded credentials in n/a (high 8.8)
- [CVE-2023-30063](https://insights.sbomify.com/CVE-2023-30063/): Auth bypass in n/a (high 7.5)
- [CVE-2025-8231](https://insights.sbomify.com/CVE-2025-8231/): D-Link DIR-890L UART Port rgbin hard-coded credentials (high 7.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-30521 and fix it if it is affected.

What it is: CVE-2022-30521 is a critical memory corruption vulnerability in n/a, published on 27 May 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2022-30521 in the wild and no public exploit code.

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-2022-30521/ (Markdown: https://insights.sbomify.com/CVE-2022-30521/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-30521
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-30521
- OSV: https://osv.dev/vulnerability/CVE-2022-30521

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-30521/
Summaries are generated and may contain mistakes; the official description above is the record.