// For flags

CVE-2021-33834

 

Severity Score

7.1
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

Track*
*SSVC
Descriptions

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.

Se descubrió un problema en iscflashx64.sys 3.9.3.0 en Insyde H2OFFT 6.20.00. Cuando se gestiona IOCTL 0x22229a, la entrada utilizada para asignar el búfer y copiar memoria se maneja incorrectamente. Esto podría causar daños en la memoria o un bloqueo del sistema.

*Credits: N/A
CVSS Scores
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
High
Attack Vector
Local
Attack Complexity
Low
Authentication
Single
Confidentiality
Complete
Integrity
None
Availability
Complete
* Common Vulnerability Scoring System
SSVC
  • Decision:Track*
Exploitation
None
Automatable
No
Tech. Impact
Total
* Organization's Worst-case Scenario
Timeline
  • 2021-06-03 CVE Reserved
  • 2023-09-08 CVE Published
  • 2024-09-26 CVE Updated
  • 2025-03-30 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-787: Out-of-bounds Write
CAPEC
References (2)
URL Tag Source
https://www.insyde.com/security-pledge Not Applicable
URL Date SRC
URL Date SRC
URL Date SRC
https://www.insyde.com/security-pledge/SA-2021004 2023-09-13
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Insyde
Search vendor "Insyde"
 H2offt
Search vendor "Insyde" for product "H2offt"
 6.20.00
Search vendor "Insyde" for product "H2offt" and version "6.20.00"
-
Affected
Insyde
Search vendor "Insyde"
 Iscflashx64.sys
Search vendor "Insyde" for product "Iscflashx64.sys"
 3.9.3.0
Search vendor "Insyde" for product "Iscflashx64.sys" and version "3.9.3.0"
-
Affected