Home/CVE/Out-of-bounds write vulnerability in the WEB module.Impact: Successful exploitation of this vulnerability will affect av
CVE

CVE-2026-34866

Out-of-bounds write vulnerability in the WEB module.Impact: Successful exploitation of this vulnerability will affect av

Out-of-bounds write vulnerability in the WEB module.Impact: Successful exploitation of this vulnerability will affect availability and confidentiality.

MEDIUM · CVSS 5.1 EPSS 9e-05
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
▤

Affected Products & Versions

1
huawei harmonyosall versions
▣

Scoring & Timeline

5.1
MEDIUM · CVSS v3.1 · psirt@huawei.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD13 Apr 2026 · 07:16 AM
CVSS VectorCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
no
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
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References & Sources

1
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://consumer.huawei.com/en/support/bulletinwearables/2026/4/Vendor Advisory
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