What is CVE-2026-34865?

CVE-2026-34865 is a critical-severity vulnerability in Huawei Harmonyos, classified under Heap-based Buffer Overflow. CVSS score: 9.1/10. Published 2026-04-13.

How severe is CVE-2026-34865?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Buffer overflow in Huawei Harmonyos

CVE-2026-34865

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

Vulnerability class: Buffer Overflow

EPSS: 0.002 (11.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H.

Affected products

Huawei Harmonyos — versions 6.0.0

Weakness classification (CWE)

CWE-122 — Heap-based Buffer Overflow

References

psirt@huawei.com (Vendor Advisory)

Frequently asked questions

What is CVE-2026-34865?: CVE-2026-34865 is a critical-severity vulnerability in Huawei Harmonyos, classified under Heap-based Buffer Overflow. CVSS score: 9.1/10. Published 2026-04-13.
How severe is CVE-2026-34865?: Critical severity. CVSS v3 base score is 9.1 out of 10.