CVE-2021-47739
CVE-2021-47739 is a high-severity vulnerability with a CVSS 3.x base score of 8.4. 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 8.4)
- CVSS v4: 8.5
- EPSS exploit prediction: 0% (6th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2025-204818
- Weakness: CWE-428
- Published:
- Last modified:
Description
Epic Games Easy Anti-Cheat 4.0 contains an unquoted service path vulnerability that allows local non-privileged users to execute arbitrary code with elevated system privileges. Attackers can exploit the service configuration by inserting malicious code in the system root path that would execute with LocalSystem privileges during application startup.
Frequently asked questions
- What is CVE-2021-47739?
- Epic Games Easy Anti-Cheat 4.0 contains an unquoted service path vulnerability that allows local non-privileged users to execute arbitrary code with elevated system privileges. Attackers can exploit the service configuration by inserting malicious code in the system root path that would execute with LocalSystem privileges during application startup.
- How severe is CVE-2021-47739?
- CVE-2021-47739 has a CVSS 3.x base score of 8.4, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2021-47739 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (6th percentile), an estimate of the probability of exploitation in the next 30 days.
- How do I fix CVE-2021-47739?
- 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-2021-47739 have an EU (EUVD) identifier?
- Yes. CVE-2021-47739 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-204818.
- When was CVE-2021-47739 published?
- CVE-2021-47739 was published on 2025-12-23 and last updated on 2026-06-17.
References
- https://www.easy.ac
- https://www.epicgames.com
- https://www.exploit-db.com/exploits/49841
- https://www.vulncheck.com/advisories/epic-games-easy-anti-cheat-local-privilege-escalation-via-unquoted-service-path
- https://www.zeroscience.mk/en/vulnerabilities/ZSL-2021-5652.php
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