EUVD-2026-21800

| CVE-2026-34856 HIGH
2026-04-13 huawei GHSA-pvgc-rj6v-rx44
7.3
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
High

Lifecycle Timeline

1
Analysis Generated
Apr 13, 2026 - 04:24 vuln.today

Tags

Race Condition Information Disclosure Harmonyos

Description

UAF vulnerability in the communication module. Impact: Successful exploitation of this vulnerability may affect availability.

Analysis

Use-after-free in Huawei HarmonyOS communication module allows local attackers to cause denial of service and potentially disclose information without authentication. The vulnerability stems from a race condition (CWE-362) enabling memory corruption with high availability impact. …

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Remediation

Within 24 hours: Identify and inventory all HarmonyOS devices in production environments and assess which have local user access. Within 7 days: Implement access controls to restrict local authentication on affected devices and isolate high-risk systems from sensitive networks if feasible. …

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Priority Score

36
Low Medium High Critical
KEV: 0
EPSS: +0.0
CVSS: +36
POC: 0

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EUVD-2026-21800 vulnerability details – vuln.today
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