CVE-2021-47880
CVE-2021-47880 is a high-severity vulnerability with a CVSS 3.x base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-428.
Key facts
- Severity: High (CVSS 3.x base score 7.8)
- CVSS v4: 8.5
- EPSS exploit prediction: 0% (3rd percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-3631
- Weakness: CWE-428
- Published:
- Last modified:
Description
Realtek Wireless LAN Utility 700.1631 contains an unquoted service path vulnerability that allows local users to potentially execute code with elevated system privileges. Attackers can exploit the unquoted service path by inserting malicious code in the system root path that would execute during application startup or system reboot.
Frequently asked questions
- What is CVE-2021-47880?
- Realtek Wireless LAN Utility 700.1631 contains an unquoted service path vulnerability that allows local users to potentially execute code with elevated system privileges. Attackers can exploit the unquoted service path by inserting malicious code in the system root path that would execute during application startup or system reboot.
- How severe is CVE-2021-47880?
- CVE-2021-47880 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2021-47880 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.
- How do I fix CVE-2021-47880?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- Does CVE-2021-47880 have an EU (EUVD) identifier?
- Yes. CVE-2021-47880 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-3631.
- When was CVE-2021-47880 published?
- CVE-2021-47880 was published on 2026-01-21 and last updated on 2026-06-17.
References
- https://www.exploit-db.com/exploits/49646
- https://www.realtek.com/en/
- https://www.vulncheck.com/advisories/realtek-wireless-lan-utility-realteknsu-unquoted-service-path
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