Epic Games Easy Anti-Cheat 4.0 Local Privilege Escalation via Unquoted Service Path
Priority HIGH 72CWE-428Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-428.
Summary
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.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00185 8th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Epic Games | Easy Anti-Cheat | 4.0 | — | No fix listed | CNA |
- Easy Anti-Cheat VendorEpic Games Affected 4.0 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-47739
- 2026-10-03 Alias added: GHSA-r6ff-6pwf-xvp7
References
More Epic Games vulnerabilities
- TI-2004-00549 The Unreal Engine, as used in DeusEx 1.112fm and earlier, Devastation 390 and earlier… CVSS 2.0HIGH 10.0
- TI-2021-22359 Epic Games Psyonix Rocket League <=1.95 Elevation of Privileges via Insecure Permissions CVSS 4.0HIGH 8.5
- TI-2003-01332 Epic Games Unreal Engine 226f through 436 allows remote attackers to cause a denial of… CVSS 2.0HIGH 10.0
- TI-2008-03270 Buffer overflow in Unreal Tournament 3 1.3beta4 and earlier allows remote attackers to… CVSS 2.0HIGH 7.5
- TI-2018-12639 OS command injection in Epic Games Launcher CVSS 3.0HIGH 8.8
- TI-2008-04067 Directory traversal vulnerability in ImageServer (aka UTImageServer) in WebAdmin before… CVSS 2.0HIGH 7.8
Sources
- CVE-2021-47739 · CVE Program
- CVE-2021-47739 · NVD
- FIRST EPSS
- GHSA-r6ff-6pwf-xvp7 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences