Vulnerability-Lookup

CVE-2021-43614 (GCVE-0-2021-43614)

Vulnerability from cvelistv5 – Published: 2026-09-03 02:15 – Updated: 2026-09-03 13:13

Title

VariableEditSmm: Error checking of UEFI variables could cause buffer overflow, leading to code execution

Summary

Error in handling the PlatformLangCodes UEFI variable could cause a buffer overflow, leading to resource exhaustion and failure.

Severity

6.7 (Medium)


                        
                          CVSS:3.1/AV:P/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:L

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-03 13:13 UTC

CWE

CWE-120 - Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

Assigner

Insyde mitre root

References

1 reference

URL	Tags
https://www.insyde.com/security-pledge/sa-2022026/

Impacted products

1 product

Vendor	Product	Version	CPE status
Insyde Software	InsydeH2O	Affected: InsydeH2OUvePkg , < 01.01.04.0008 (custom)	guessed

Date Public

2026-09-03 02:11

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2021-43614

Vulnerability from fkie_nvd - Published: 2026-09-03 13:04 - Updated: 2026-09-03 18:09

Severity

6.7 (Medium) - CVSS:3.1/AV:P/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:L

Summary

Error in handling the PlatformLangCodes UEFI variable could cause a buffer overflow, leading to resource exhaustion and failure.

References

	URL	Tags
	8338d8cb-57f7-4252-abc0-96fd13e98d21	https://www.insyde.com/security-pledge/sa-2022026/

Impacted products

	Vendor	Product	Version

JSON

To clipboard

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GHSA-J24H-M5CW-7785

Vulnerability from github – Published: 2026-09-03 15:32 – Updated: 2026-09-03 15:32

Details

Error in handling the PlatformLangCodes UEFI variable could cause a buffer overflow, leading to resource exhaustion and failure.

Severity

6.7 (Medium)


                  
                    CVSS:3.1/AV:P/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:L

Show details on source website

JSON

To clipboard

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  "affected": [],
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    "CVE-2021-43614"
  ],
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      "CWE-120"
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    "github_reviewed": false,
    "github_reviewed_at": null,
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    "severity": "MODERATE"
  },
  "details": "Error in handling the PlatformLangCodes UEFI variable could cause a buffer overflow, leading to resource exhaustion and failure.",
  "id": "GHSA-j24h-m5cw-7785",
  "modified": "2026-09-03T15:32:08Z",
  "published": "2026-09-03T15:32:08Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-43614"
    },
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      "type": "WEB",
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    }
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      "type": "CVSS_V3"
    }
  ]
}

GSD-2021-43614

Vulnerability from gsd - Updated: 2023-12-13 01:23

Details

** RESERVED ** This candidate has been reserved by an organization or individual that will use it when announcing a new security problem. When the candidate has been publicized, the details for this candidate will be provided.

Aliases

CVE-2021-43614

Aliases

CVE-2021-43614

JSON

To clipboard

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}

SSA-306654

Vulnerability from csaf_siemens - Published: 2022-02-22 00:00 - Updated: 2026-08-11 00:00

Summary

SSA-306654: Insyde BIOS Vulnerabilities in Siemens Industrial Products

Scope

26 vulnerabilities in this advisory, including CVE-2021-43614.

CVE-2021-43614

Error in handling the PlatformLangCodes UEFI variable in the VariableEditSmm driver could cause a buffer overflow, leading to resource exhaustion and failure.

6.7 (Medium)


                
                  CVSS:3.1/AV:P/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:L

Known affected: 17 products

https://support.industry.siemens.com/cs/ww/en/view/109763408/

Open the full advisory

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

CVE-2021-43614 (GCVE-0-2021-43614)

FKIE_CVE-2021-43614

GHSA-J24H-M5CW-7785

GSD-2021-43614

SSA-306654

Tags

Sightings

Nomenclature