CVE-2021-47726

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.

CVSS v4.0

8.7 HIGHCVSS: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:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS v3.1

7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS

0.30% chance of exploitation in the next 30 days, 23th percentile

Published

2025-12-31

Updated

2026-01-02

Proof-of-concept exploits (1)

• https://www.exploit-db.com/exploits/49634

References

• CVE Record
• NVD entry

Related

• CVE-2021-47725
• CVE-2021-47727
• CVE-2021-47724
• CVE-2021-47728
• CVE-2021-47723
• CVE-2021-47729