Privilege Escalation Vulnerability in NuCom 11N Wireless Router
CVE-2021-47726

8.7HIGH

Key Information:

Vendor

Nucom

Status
Nucom 11n Wireless Router
Vendor
CVE Published:
31 December 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2021-47726?

The NuCom 11N Wireless Router version 5.07.90 is vulnerable to privilege escalation due to improper handling of requests to the configuration backup endpoint. Non-privileged users can exploit this flaw by sending a specially crafted HTTP GET request. This allows attackers to access and decode sensitive administrative credentials embedded in the backup configuration, leading to unauthorized access and potential takeover of the device.

Affected Version(s)

NuCom 11N Wireless Router 5.07.90

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2021-47726 - Proof of Concept

References

https://www.exploit-db.com/exploits/49634
exploit
https://www.nucom.es
product
https://www.zeroscience.mk/en/vulnerabilities/ZSL-2021-56...
third-party-advisory

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

LiquidWorm as Gjoko Krstic of Zero Science Lab
JSON
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CVE-2021-47726 : Privilege Escalation Vulnerability in NuCom 11N Wireless Router