CVE-2021-34471: high-severity vulnerability in Microsoft Malware Protection Engine
Microsoft Defender Elevation of Privilege Vulnerability
Published · Updated
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.8epss 0.5%
exploitation probability
0.5%top 58% of all CVEs
observed exploitation
nono source reports it
Microsoft Defender Elevation of Privilege Vulnerability
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Affected products
Microsoft · Microsoft Malware Protection EngineRelated CVEs — Microsoft Malware Protection Engine
In the same product, most dangerous first.
CVE-2026-41091HIGHMicrosoft Defender Elevation of Privilege VulnerabilityEPSS 0.4%KEVCVE-2021-31985HIGHMicrosoft Defender Remote Code Execution VulnerabilityEPSS 7.8%CVE-2021-42298HIGHMicrosoft Defender Remote Code Execution VulnerabilityEPSS 5.8%CVE-2023-24860HIGHMicrosoft Defender Denial of Service VulnerabilityEPSS 3.0%CVE-2022-24548MEDIUMMicrosoft Defender Denial of Service VulnerabilityEPSS 3.0%CVE-2021-34522HIGHMicrosoft Defender Remote Code Execution VulnerabilityEPSS 2.7%