CVE-2021-21540: dell idrac9_firmware Stack-based Buffer Overflow
CVSS: 8.1v3.1HighModified
Published 30-04-2021Last modified 16-09-2024
Vulnerability summary
CVE-2021-21540 is a high (CVSS 8.1) Stack-based Buffer Overflow vulnerability in dell idrac9_firmware. EPSS estimates a 1.16% chance of exploitation in the next 30 days, higher than 66.5% of scored vulnerabilities.
CVSS score
8.1/10
010
High · v3.1 (NVD)EPSS score
1.16%
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 stack-based overflow vulnerability. A remote authenticated attacker could potentially exploit this vulnerability to overwrite configuration information by injecting arbitrarily large payload.
CVSS metrics
3 scores · 2 sources · 2 versionsHigh 8.1Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:HSources2 sources · 5.9–8.1
- CVE.orgCNA5.9MediumCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:LDiffers
Medium 5.5Preferred score · NVD (NIST)
AV:N/AC:L/Au:S/C:N/I:P/A:PSourcesSingle source
EPSS trend
Probability
1.16%
Chance of exploitation in the next 30 days
Percentile
67%
Versus all other CVEs
30-day change
0.00 pp
From 1.16% on 19-09-2026
19-09-202619-10-2026
EPSS score1.16%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-121Stack-based Buffer OverflowA stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).
- CWE-787Out-of-bounds WriteThe product writes data past the end, or before the beginning, of the intended buffer.
Affected systems
Dell2 products
- idrac9_firmware< 4.40.00.00
- integrated dell remote access controller (idrac)≥ unspecified, < 4.40.00.00
1 vendor · 2 products