CVE-2026-34863

Out-of-bounds write vulnerability in the file system. Impact: Successful exploitation of this vulnerability may affect availability.

CVSS v3 6.7 MEDIUM

6.7^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 0.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://consumer.huawei.com/en/support/bulletin/2026/4/	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:huawei:harmonyos:5.1.0:::::::*
	cpe:2.3:o:huawei:harmonyos:6.0.0:::::::*

History

26 Oct 2026, 00:10

Type	Values Removed	Values Added
Summary		(es) Vulnerabilidad de escritura fuera de límites en el sistema de archivos. Impacto: Explotación exitosa de esta vulnerabilidad puede afectar la disponibilidad.

Information

Published : 2026-04-13 05:16

Updated : 2026-10-26 00:10

NVD link : CVE-2026-34863

Mitre link : CVE-2026-34863

CVE.ORG link : CVE-2026-34863

JSON object : View

Products Affected

huawei

harmonyos

CWE

CWE-787

Out-of-bounds Write

{"id": "CVE-2026-34863", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-34863", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-04-13T13:18:42.601783Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "psirt@huawei.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6.7, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "HIGH", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 0.8}, {"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 1.8}]}, "affected": [{"source": "psirt@huawei.com", "affectedData": [{"vendor": "Huawei", "product": "HarmonyOS", "versions": [{"status": "affected", "version": "6.0.0"}, {"status": "affected", "version": "5.1.0"}], "defaultStatus": "unaffected"}]}], "published": "2026-04-13T05:16:04.250", "references": [{"url": "https://consumer.huawei.com/en/support/bulletin/2026/4/", "tags": ["Vendor Advisory"], "source": "psirt@huawei.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "psirt@huawei.com", "description": [{"lang": "en", "value": "CWE-787"}]}], "descriptions": [{"lang": "en", "value": "Out-of-bounds write vulnerability in the file system.\nImpact: Successful exploitation of this vulnerability may affect availability."}, {"lang": "es", "value": "Vulnerabilidad de escritura fuera de l\u00edmites en el sistema de archivos.\nImpacto: Explotaci\u00f3n exitosa de esta vulnerabilidad puede afectar la disponibilidad."}], "lastModified": "2026-10-26T00:10:00.150", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:huawei:harmonyos:5.1.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "E39DE6A6-CBE6-4086-93CD-113D1B3BA730"}, {"criteria": "cpe:2.3:o:huawei:harmonyos:6.0.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "0EBE30DD-E146-4A6A-BE68-DEF9D4D0B2A8"}], "operator": "OR"}]}], "sourceIdentifier": "psirt@huawei.com"}