← Vulnerability feed

Vulnerability record · CVE-2021-47726 · published 31 December 2025

CVE-2021-47726: Insufficiently protected credentials vulnerability

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.

8.7 CVSS 4.0 High EPSS 0.30% · top 79.3% CWE-522 · Insufficiently protected credentials Deferred
8.7CVSS 4.0 base score
0.30%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

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.

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/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:

References

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

Track CVE-2021-47726 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2021-22681Rockwell Logix Designer authentication bypass via weak key verificationRockwell Automation Studio 5000 Logix Designer (v21+) and RSLogix 5000 (v16-20) rely on a key to verify that Logix controllers are talking to genuine…KEVEPSS 64%analysed9.8CVE-2021-30116Kaseya VSA credential disclosure via unauthenticated download pageKaseya VSA before 9.5.7 exposes an unauthenticated download page (dl.asp) that leaks agent credentials and accepts them via GET request. An attacker …KEVEPSS 86%analysed9.8CVE-2020-29583Zyxel USG and ATP firmware hard-coded admin credentialZyxel USG and ATP firmware version 4.60 ships an undocumented account (zyfwp) whose password is stored in cleartext in the firmware and cannot be cha…KEVEPSS 90%analysed9.8CVE-2017-9248Telerik UI for ASP.NET AJAX and Sitefinity cryptographic key protection flawTelerik.Web.UI.dll in Progress Telerik UI for ASP.NET AJAX (before R2 2017 SP1) and Sitefinity (before 10.0.6412.0) fails to properly protect the Tel…KEVEPSS 75%analysed8.8CVE-2014-1812Microsoft Windows Group Policy Preferences credential exposure and privilege escalationGroup Policy Preferences in multiple Windows versions stored and distributed passwords in a way that did not properly protect them, allowing any auth…KEVEPSS 65%analysed

Source: NIST National Vulnerability Database (record CVE-2021-47726), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.