Is CVE-2021-47739 in the CISA KEV catalog?

No. CVE-2021-47739 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-47739?

CVE-2021-47739 has a CVSS v3 base score of 8.4 (HIGH).

What is the EPSS score for CVE-2021-47739?

CVE-2021-47739 has an EPSS score of 0.17% (7th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix or mitigate CVE-2021-47739?

No published fix for CVE-2021-47739 has been found yet. Check the linked vendor advisories for guidance as it becomes available.

CVE & CISA-KEV Catalog

CVE-2021-47739

HIGH

8.4

CVSS v3

NVD

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.

CWE-428

How to fix

No published remediation has been found for this vulnerability's affected products yet.

Mitigation guidance may be in the linked vendor advisories in the References section below.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

0.17%probability of exploitation in 30 days

7thpercentile

Low risk: more likely to be exploited than 7% of all known CVEs.

References

Other references5

Related Vulnerabilities

Other CWE-428 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-38408	Critical	9.8	77%	-	Fix
CVE-2020-15261	High	8.0	11%	-	Fix
CVE-2018-10619	High	7.8	2.8%	-	Fix
CVE-2019-17658	Critical	9.8	2.2%	-	-
CVE-2015-4173	Medium	6.9	2.1%	-	Fix
CVE-2019-16647	High	7.2	2.0%	-	-

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-12-29.