CVE-2026-34865 | Huawei HarmonyOS 6.0.0 Web Module heap-based overflow

VDB-357100 · CVE-2026-34865 · GCVE-0-2026-34865 HUAWEI HARMONYOS 6.0.0 WEB MODULE HEAP-BASED OVERFLOW HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 9.8 $5k-$25k 1.51+ Summaryinfo A vulnerability, which was classified as critical, was found in Huawei HarmonyOS 6.0.0. The impacted element is an unknown function of the component Web Module. Executing a manipulation can lead to heap-based overflow. This vulnerability is registered as CVE-2026-34865. It is possible to launch the attack remotely. No exploit is available. Detailsinfo A vulnerability was found in Huawei HarmonyOS 6.0.0. It has been declared as very critical. This vulnerability affects some unknown functionality of the component Web Module. The manipulation with an unknown input leads to a heap-based overflow vulnerability. The CWE definition for the vulnerability is CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes: Out-of-bounds write vulnerability in the WEB module.Impact: Successful exploitation of this vulnerability will affect availability and confidentiality. The advisory is shared for download at consumer.huawei.com. This vulnerability was named CVE-2026-34865 since 03/31/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $5k-$25k (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 6.0.0 License commercial Website Vendor: https://www.huawei.com/ CPE 2.3info 🔒 CPE 2.2info 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA CVSS-B Score: 🔒 CNA CVSS-BT Score: 🔒 CNA Vector: 🔒 CVSSv3info VulDB Meta Base Score: 9.8 VulDB Meta Temp Score: 9.8 VulDB Base Score: 9.8 VulDB Temp Score: 9.8 VulDB Vector: 🔒 VulDB Reliability: 🔍 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: Heap-based overflow CWE: CWE-122 / CWE-119 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Yes 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-2026-34865 (🔒) GCVE (CVE): GCVE-0-2026-34865 GCVE (VulDB): GCVE-100-357100 Entryinfo Created: 04/13/2026 09:43 Changes: 04/13/2026 09:43 (66) Complete: 🔍 Cache ID: 99:2FE:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸