CVE-2021-47726 NuCom 11N Wireless Router 5.07.90 Privilege Escalation via Configuration Backup
Attackers can escalate privileges and read admin credentials by sending a crafted HTTP request to the configuration backup endpoint on NuCom routers.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-47726?
CVE-2021-47726 is a high-severity vulnerability in NuCom 11N Wireless Router, published on 31 Dec 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-522
Which versions are affected by CVE-2021-47726?
How do I fix CVE-2021-47726?
No fix has been published for CVE-2021-47726 yet. Limit exposure of the affected software until one is available.
Is CVE-2021-47726 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-47726 exists.
Sources
Also known as GHSA-f57r-vv46-fp7w.