CVE-2026-34863: CWE-787 Out-of-bounds write in Huawei HarmonyOS
CVE-2026-34863 is an out-of-bounds write vulnerability in the file system component of Huawei HarmonyOS versions 5. 1. 0 and 6. 0. 0. Successful exploitation may impact system availability. The vulnerability has a CVSS 3. 1 base score of 6. 7, indicating a medium severity level. There is no vendor-provided patch or official remediation guidance available at this time.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-34863) involves an out-of-bounds write condition in the file system of Huawei HarmonyOS versions 5.1.0 and 6.0.0. The CVSS vector indicates that the attack vector is local (AV:L), attack complexity is low (AC:L), privileges required are high (PR:H), no user interaction is needed (UI:N), and the scope is unchanged (S:U). The impact affects confidentiality, integrity, and availability (C:H/I:H/A:H). The vulnerability could cause system instability or denial of service by corrupting memory outside intended bounds. No patch or remediation level has been published by Huawei as of the data provided.
Potential Impact
Exploitation of this vulnerability may lead to significant impact on system availability, potentially causing denial of service or system crashes. The CVSS score reflects high impact on confidentiality, integrity, and availability, but the attack requires local high privileges, limiting the attack surface. There are no known exploits in the wild, reducing immediate risk.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict local access to trusted users with high privileges to reduce risk. Monitor Huawei's security advisories for updates on patches or mitigations.
CVE-2026-34863: CWE-787 Out-of-bounds write in Huawei HarmonyOS
Description
CVE-2026-34863 is an out-of-bounds write vulnerability in the file system component of Huawei HarmonyOS versions 5. 1. 0 and 6. 0. 0. Successful exploitation may impact system availability. The vulnerability has a CVSS 3. 1 base score of 6. 7, indicating a medium severity level. There is no vendor-provided patch or official remediation guidance available at this time.
CVSS v3.1
Score 6.7medium
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-34863) involves an out-of-bounds write condition in the file system of Huawei HarmonyOS versions 5.1.0 and 6.0.0. The CVSS vector indicates that the attack vector is local (AV:L), attack complexity is low (AC:L), privileges required are high (PR:H), no user interaction is needed (UI:N), and the scope is unchanged (S:U). The impact affects confidentiality, integrity, and availability (C:H/I:H/A:H). The vulnerability could cause system instability or denial of service by corrupting memory outside intended bounds. No patch or remediation level has been published by Huawei as of the data provided.
Potential Impact
Exploitation of this vulnerability may lead to significant impact on system availability, potentially causing denial of service or system crashes. The CVSS score reflects high impact on confidentiality, integrity, and availability, but the attack requires local high privileges, limiting the attack surface. There are no known exploits in the wild, reducing immediate risk.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict local access to trusted users with high privileges to reduce risk. Monitor Huawei's security advisories for updates on patches or mitigations.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- huawei
- Date Reserved
- 2026-03-31T01:11:13.701Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69dc7c4782d89c981f24c27c
Added to database: 4/13/2026, 5:16:55 AM
Last enriched: 4/20/2026, 6:33:47 AM
Last updated: 5/29/2026, 8:19:35 PM
Views: 45
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