CVE-2021-43614
VariableEditSmm: Error checking of UEFI variables could cause buffer overflow, leading to code execution
Error in handling the PlatformLangCodes UEFI variable could cause a buffer overflow, leading to resource exhaustion and failure.
Attack profile
How easy it is to exploit
- Attack vector
- Physical
- Complexity
- High
- Privileges needed
- High
- User interaction
- Required
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- Low
Exploit likelihood
What each source reports
CVE List Score used
VariableEditSmm: Error checking of UEFI variables could cause buffer overflow, leading to code execution
Error in handling the PlatformLangCodes UEFI variable could cause a buffer overflow, leading to resource exhaustion and failure.
- Record
CVE-2021-43614- CVSS 3.1
- 6.7 Medium
CVSS:3.1/AV:P/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:L - Weakness
- CWE-120
- Updated
- 2026-11-02
EUVDEUVD-2021-34869
Error in handling the PlatformLangCodes UEFI variable could cause a buffer overflow, leading to resource exhaustion and failure.
- Record
EUVD-2021-34869- CVSS 3.1
- 6.7 Medium
CVSS:3.1/AV:P/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:L - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-j24h-m5cw-7785
Error in handling the PlatformLangCodes UEFI variable could cause a buffer overflow, leading to...
Error in handling the PlatformLangCodes UEFI variable could cause a buffer overflow, leading to resource exhaustion and failure.
- Record
GHSA-j24h-m5cw-7785- CVSS 3.1
- 6.7 Medium
CVSS:3.1/AV:P/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:L - Weakness
- CWE-120
- Updated
- 2026-11-02
NVD
Error in handling the PlatformLangCodes UEFI variable could cause a buffer overflow, leading to resource exhaustion and failure.
- Record
CVE-2021-43614- CVSS 3.1
- 6.7 Medium
CVSS:3.1/AV:P/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:L - Weakness
- CWE-120
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-43614 is a medium vulnerability (CVSS 6.7) in Insyde Software Insydeh2o, published September 3, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.15%, the 4th percentile. No source names a fixed version.