CVE-2026-34857 | Huawei HarmonyOS 5.1.0/6.0.0 Communication race condition

VDB-357077 · CVE-2026-34857 · GCVE-0-2026-34857 HUAWEI HARMONYOS 5.1.0/6.0.0 COMMUNICATION RACE CONDITION HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 4.3 $0-$5k 0.19+ Summaryinfo A vulnerability was found in Huawei HarmonyOS 5.1.0/6.0.0. It has been rated as problematic. The affected element is an unknown function of the component Communication Module. The manipulation leads to race condition. This vulnerability is uniquely identified as CVE-2026-34857. Local access is required to approach this attack. No exploit exists. Detailsinfo A vulnerability, which was classified as problematic, has been found in Huawei HarmonyOS 5.1.0/6.0.0. This issue affects an unknown function of the component Communication Module. The manipulation with an unknown input leads to a race condition vulnerability. Using CWE to declare the problem leads to CWE-362. The product contains a code sequence that can run concurrently with other code, and the code sequence requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence that is operating concurrently. Impacted is confidentiality, integrity, and availability. The summary by CVE is: UAF vulnerability in the communication module. Impact: Successful exploitation of this vulnerability may affect availability. The advisory is shared at consumer.huawei.com. The identification of this vulnerability is CVE-2026-34857 since 03/31/2026. The exploitation is known to be difficult. An attack has to be approached locally. Additional levels of successful authentication are required for exploitation. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 04/13/2026). There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product. Productinfo Type Smartphone Operating System Vendor Huawei Name HarmonyOS Version 5.1.0 6.0.0 License commercial Website Vendor: https://www.huawei.com/ CPE 2.3info 🔒 🔒 CPE 2.2info 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 4.3 VulDB Meta Temp Score: 4.3 VulDB Base Score: 3.9 VulDB Temp Score: 3.9 VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA Base Score: 4.7 CNA Vector (huawei): 🔒 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Race condition CWE: CWE-362 CAPEC: 🔒 ATT&CK: 🔒 Physical: Partially Local: Yes Remote: No Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: no mitigation known Status: 🔍 0-Day Time: 🔒 Timelineinfo 03/31/2026 CVE reserved 04/13/2026 +13 days Advisory disclosed 04/13/2026 +0 days VulDB entry created 04/13/2026 +0 days VulDB entry last update Sourcesinfo Vendor: huawei.com Advisory: consumer.huawei.com Status: Confirmed CVE: CVE-2026-34857 (🔒) GCVE (CVE): GCVE-0-2026-34857 GCVE (VulDB): GCVE-100-357077 Entryinfo Created: 04/13/2026 07:41 Changes: 04/13/2026 07:41 (62) Complete: 🔍 Cache ID: 99:A55:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸