Vuln: CVE-2021-4034 | Detection.FYI

Potential Privilege Escalation via PKEXEC

Sep 19, 2026 · Domain: Endpoint OS: Linux Use Case: Threat Detection Tactic: Privilege Escalation Data Source: Elastic Endgame Use Case: Vulnerability Data Source: Elastic Defend Data Source: SentinelOne Resources: Investigation Guide Noise: Low Performance: Normal Profile: Recommended Threat: Vulnerability Exploit Rule Type: Event Correlation (EQL) Platform: Linux Vuln: CVE-2021-4034 ·
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Identifies an attempt to exploit a local privilege escalation in polkit pkexec (CVE-2021-4034) via unsecure environment variable injection. Successful exploitation allows an unprivileged user to escalate to the root user.

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