CVE-2021-47726 - CVE House
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Status published High CVE-2021-47726

NuCom 11N Wireless Router 5.07.90 Privilege Escalation via Configuration Backup

Vulnerability 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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

  • LiquidWorm as Gjoko Krstic of Zero Science Lab

References

Affected Vendor

Affected Software

NuCom 11N Wireless Router
Vulnerable Versions:
5.07.90

Timeline

Official Publish: December 31st, 2025
Last Modified: January 2nd, 2026
Added to House: July 21st, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Weaknesses (CWE)

CWE-522

MITRE ATT&CK TTPs

T1552 Unsecured Credentials
Credential Access
T1555 Credentials from Password Stores
Credential Access
T1078 Valid Accounts
Persistence
T1021 Remote Services
Lateral Movement
T1098 Account Manipulation
Privilege Escalation