What’s Vulnerable › Vulnerabilities
CVE-2021-21539
- Severity: high (CVSS 7.1 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.6% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2021-04-30 · updated 2026-06-17
- Weakness: CWE-367
Description
Dell EMC iDRAC9 versions prior to 4.40.00.00 contain a Time-of-check Time-of-use (TOCTOU) race condition vulnerability. A remote authenticated attacker could potentially exploit this vulnerability to gain elevated privileges when a user with higher privileges is simultaneously accessing iDRAC through the web interface.
Affected products
- Dell EMC iDRAC: before 4.40.00.00 — fixed in 4.40.00.00
How to fix
Upgrade to a fixed version: Dell EMC iDRAC 4.40.00.00. Check the vendor advisory for mitigations.
References
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