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Status published
High
CVE-2021-33834
An issue was discovered in iscflashx64.sys 3.9.3.0 in Insyde H2OFFT...
Vulnerability Description
An issue was discovered in iscflashx64.sys 3.9.3.0 in Insyde H2OFFT 6.20.00. When handling IOCTL 0x22229a, the input used to allocate a buffer and copy memory is mishandled. This could cause memory corruption or a system crash.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
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Credits & Attribution
No credits recorded in the NVD database.
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Affected Vendor
insyde
View all reports →Affected Software
h2offt, iscflashx64.sys
Vulnerable Versions:
6.20.00, 3.9.3.0
Timeline
Official Publish:
September 8th, 2023
Last Modified:
September 26th, 2024
Added to House:
July 21st, 2026
CVSS Vectors
V3:
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Weaknesses (CWE)
No CWE data available
MITRE ATT&CK TTPs
No associated TTPs found for this vulnerability.