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Vulnerability Detail

CVE-2026-49304UPDATED Verified Sceawere Triage Sources: NVD / CISA KEV

Device Key Management Permission Flaw

Vulnerability Metadata

Severity
Medium
Score / CVSS
6.2
Creation Date
4h ago
Vendor
Huawei
Product
HarmonyOS
Attack Type
CWE-264 Permissions, Privileges, and Access Controls
Vector String
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Complexity
LOW

Narrative and Response

Description

Permission control vulnerability in the device key management module. Impact: Successful exploitation of this vulnerability may affect availability.

Executive Summary

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Technical Details

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Mitigations

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References

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Additional Metadata

{
  "score": "6.2",
  "pubDate": "2026-08-17T09:17:30.433Z",
  "pubdate": "2026-08-17T09:17:30.433Z",
  "executiveSummary": "This security advisory details a permission control vulnerability identified within the device key management module. The flaw arises from inadequate access controls and insufficient authorization enforcement governing cryptographic keys and sensitive operational states handled by the module. An unauthenticated or unauthorized malicious actor capable of interacting with the affected interface can exploit this deficiency to manipulate, exhaust, or disrupt critical key management functions.\nThe primary impact of successful exploitation is the degradation or total loss of system availability. By interfering with cryptographic operations, key lifecycle management, or secure storage access, an attacker can render dependent cryptographic services inoperable, precipitate denial-of-service conditions, or cause unexpected device reboots and faults. The risk implications are severe for environments relying on continuous cryptographic availability for secure communications, data protection, or device integrity verification.\nExploitation requirements depend on network or local reachability to the vulnerable device key management module. Given the nature of permission control deficiencies within core administrative or cryptographic modules, successful attacks may be executed without advanced privileges if access boundaries are improperly enforced. Mitigating this vulnerability requires strict authorization checks, rigorous input validation, and proper least-privilege enforcement across all endpoints within the device key management architecture.",
  "technicalDetails": "The vulnerability resides specifically within the device key management module, a critical component responsible for handling cryptographic key generation, storage, retrieval, and lifecycle states. The root cause of the vulnerability stems from improper permission control logic, where the application fails to adequately verify whether an interacting user, process, or interface possesses the requisite authorization before executing sensitive operations.\nFrom an architectural standpoint, the vulnerable component exposes programmatic interfaces or procedural handlers within the key management subsystem that lack robust access control lists or session validation mechanisms. When a request is dispatched to the device key management module, the underlying authorization checks are either omitted, incorrectly implemented, or overly permissive, allowing unauthorized callers to invoke privileged functions intended strictly for administrative entities.\nThe attack flow proceeds as follows: First, the adversary establishes communication with the targeted device interface exposing the device key management module. Second, the attacker formulates a sequence of API calls, command inputs, or functional requests targeted at sensitive key manipulation routines within the module. Because the permission control module fails to authenticate or validate the authorization context of the incoming request, the underlying component processes the command rather than rejecting it.\nDuring exploitation, the malicious payload or command sequence interacts directly with cryptographic stores or operational states. This can manifest as unauthorized deletion, overwriting, corruption, or premature exhaustion of critical device keys. Consequently, dependent services attempting to utilize these compromised or missing keys encounter fatal exceptions, cryptographic verification failures, or unrecoverable state corruption.\nThe post-exploitation impact centers squarely on availability. By sabotaging the integrity and availability of the cryptographic material managed by the device key management module, the attacker induces a denial-of-service condition. Services requiring cryptographic validation fail to initialize or execute, potentially locking administrators out of the device or disabling secure data processing pipelines entirely. Privilege requirements and authentication prerequisites are effectively bypassed due to the flawed permission verification logic governing the target module."
}
CVE-2026-49304: Device Key Management Permission Flaw (MEDIUM Severity, CVSS: 6.2) - Sceawere