EUVD-2026-21792
GHSA-wr2h-3c4w-c34q
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain
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AccessGain local admin access
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DeliveryTrigger concurrent notifications
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ExploitCreate race condition window
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ExecutionCause notification service degradation
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ImpactAvailability impact
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A06:2025 - Insecure Design
ASVS 5.0
V15 - Secure Coding and Architecture Concurrency control, locking
MITRE ATT&CK
1 technique across 1 tactic: Privilege Escalation The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Impact | This vulnerability presents minimal real-world risk despite being formally disclosed. CVSS score of 1.9 is accurate: local-only attack vector (AV:L) restricts access to physical attackers or already-compromised accounts; high attack complexity (AC:H) indicates race conditions require precise timing; elevated privilege requirement (PR:H) further restricts the attack surface to admin-level accounts. EPSS score not provided in input. Absence of KEV status, POC availability, or exploitation reports suggests this remains theoretical. The combination of high privilege requirement, high complexity, and limited impact (availability only) places this in low-priority remediation category - it does not represent active threat to typical deployments. |
| Exploit ScenarioDerived | An authenticated administrator or system process on a HarmonyOS device exploits a timing window in the notification service's resource handling by triggering multiple rapid notification operations that race to access shared state. If the race condition is won, the service degrades or crashes, affecting notification delivery until the service restarts. |
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Alert meAnalysisAIv1 – Apr 13, 2026
Race condition in Huawei HarmonyOS notification service allows local high-privilege attackers to cause limited availability impact through timing-dependent exploitation. CVSS 1.9 reflects minimal real-world risk due to high attack complexity, elevated privileges, and no confidentiality or integrity effects. No public exploit code or active exploitation confirmed.
RemediationAI
Apply the security patch from Huawei's official advisory at https://consumer.huawei.com/en/support/bulletin/2026/4/. Patch availability and specific version numbers should be confirmed via Huawei's support portal. As an interim measure, restrict administrative access and monitor notification service logs for suspicious timing patterns. This vulnerability requires administrative-level access, so principle of least privilege mitigation is effective.
Affected VersionsENISA
Affected Packages
Source: OSV (Open Source Vulnerabilities)
Affects your stack
Affects 1 package in euvd
Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
The vulnerability exists in HarmonyOS notification service as a classic race condition (CWE-362), where concurrent access to shared resources during notification processing creates a window for state manipulation. Attack requires local system access with high privileges (PR:H per CVSS vector), meaning the attacker must already be an administrative or system user. The vulnerability affects resource availability rather than data confidentiality or integrity, limiting practical impact to denial of service of notification functionality.
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Severity by source
AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
Lifecycle Timeline
3DescriptionNVD
Race condition vulnerability in the notification service. Impact: Successful exploitation of this vulnerability may affect availability.
Threat Intelligence Overview
NVD
CVE.org
EPSS
Vulnrichment
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.
Race conditions occur when multiple concurrent requests exploit the brief time gap between checking a condition and acting upon it (TOCTOU - Time of Check, Time of Use).
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