Data alteration and service interruption via out-of-bounds write
Published Apr 13, 2026 · Updated Apr 13, 2026
Out-of-bounds write in the WEB module in Huawei HarmonyOS 6.0.0 allows local users to alter data and interrupt service. Huawei has not disclosed the affected function, the input that reaches it, or how the WEB module writes beyond the destination buffer. Exploitation requires local access but no authentication or user interaction; successful exploitation alters data and interrupts service.
Summary
What happened
Out-of-bounds write in the WEB module in Huawei HarmonyOS 6.0.0 allows local users to alter data and interrupt service. Huawei has not disclosed the affected function, the input that reaches it, or how the WEB module writes beyond the destination buffer. Exploitation requires local access but no authentication or user interaction; successful exploitation alters data and interrupts service.
The record
- CVE
- CVE-2026-34866
- Published
- Apr 13, 2026
- Updated
- Apr 13, 2026
- Vendor
- MindSpore
- Product
- HarmonyOS
- Classifications
- CWE-120
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Apr 13, 2026CVE publishedPublication date reported by the CVE source.
- Apr 13, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=6.0.0
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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