Unquoted Service Path Vulnerability in Realtek Wireless LAN Utility
CVE-2021-47880

8.5HIGH

Key Information:

Vendor

Realtek Semiconductor Corp.

Status
Realtek Wireless Lan Utility
Vendor
CVE Published:
21 January 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2021-47880?

The Realtek Wireless LAN Utility version 700.1631 contains a vulnerability stemming from an unquoted service path issue. This flaw allows local users to potentially execute arbitrary code with elevated system privileges by manipulating the service execution path. If a malicious actor inserts harmful code into the system root path, it can be executed upon application startup or during system reboot, leading to serious security implications for affected systems.

Affected Version(s)

Realtek Wireless LAN Utility 700.1631

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-2021-47880 - Proof of Concept

References

https://www.exploit-db.com/exploits/49646
exploit
https://www.realtek.com/en/
product
https://www.vulncheck.com/advisories/realtek-wireless-lan...
third-party-advisory

CVSS V4

Score:
8.5
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
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

Luis Martinez
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