CVE-2021-21538: dell idrac9_firmware Improper Authentication
CVSS: 10.0v3.1CriticalModified
Published 29-07-2021Last modified 17-09-2024
Vulnerability summary
CVE-2021-21538 is a critical (CVSS 10.0) Improper Authentication vulnerability in dell idrac9_firmware. EPSS estimates a 1.50% chance of exploitation in the next 30 days, higher than 73.8% of scored vulnerabilities.
CVSS score
10.0/10
010
Critical · v3.1 (NVD)EPSS score
1.50%
0%100%
Low · -0.23 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 29-07-2021PublishedVulnerability first disclosed.
- 17-09-2024Last modifiedVulnerability information updated.
Description
Dell EMC iDRAC9 versions 4.40.00.00 and later, but prior to 4.40.10.00, contain an improper authentication vulnerability. A remote unauthenticated attacker could potentially exploit this vulnerability to gain access to the virtual console.
CVSS metrics
3 scores · 2 sources · 2 versionsCritical 10.0Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:HSources2 sources · 9.6–10.0
- CVE.orgCNA9.6CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:LDiffers
High 7.5Preferred score · NVD (NIST)
AV:N/AC:L/Au:N/C:P/I:P/A:PSourcesSingle source
EPSS trend
Probability
1.50%
Chance of exploitation in the next 30 days
Percentile
74%
Versus all other CVEs
30-day change
-0.23 pp
From 1.73% on 19-09-2026
19-09-202619-10-2026
EPSS score1.50%
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, < 4.40.10.00
- integrated dell remote access controller (idrac)≥ unspecified, < 4.40.10.00
1 vendor · 2 products