CVE-2021-21539: dell idrac9_firmware
CVSS: 7.1v3.1HighModified
Published 30-04-2021Last modified 16-09-2024
Vulnerability summary
CVE-2021-21539 is a high (CVSS 7.1) vulnerability in dell idrac9_firmware. EPSS estimates a 0.62% chance of exploitation in the next 30 days, higher than 48.5% of scored vulnerabilities.
CVSS score
7.1/10
010
High · v3.1 (NVD)EPSS score
0.62%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 30-04-2021PublishedVulnerability first disclosed.
- 16-09-2024Last modifiedVulnerability information updated.
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.
CVSS metrics
3 scores · 2 sources · 2 versionsHigh 7.1Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:HSources2 sources · 5.9–7.1
- CVE.orgCNA5.9MediumCVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:H/A:LDiffers
Medium 4.6Preferred score · NVD (NIST)
AV:N/AC:H/Au:S/C:P/I:P/A:PSourcesSingle source
EPSS trend
Probability
0.62%
Chance of exploitation in the next 30 days
Percentile
49%
Versus all other CVEs
30-day change
0.00 pp
From 0.62% on 19-09-2026
19-09-202619-10-2026
EPSS score0.62%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Dell2 products
- idrac9_firmware< 4.40.00.00
- integrated dell remote access controller (idrac)≥ unspecified, < 4.40.00.00
1 vendor · 2 products