What is CVE-2026-34863?

CVE-2026-34863 is a medium-severity vulnerability in Huawei Harmonyos, classified under Out-of-bounds Write. CVSS score: 6.7/10. Published 2026-04-13.

How severe is CVE-2026-34863?

Medium severity. CVSS v3 base score is 6.7 out of 10.

Buffer overflow in Huawei Harmonyos

CVE-2026-34863

Out-of-bounds write vulnerability in the file system. Impact: Successful exploitation of this vulnerability may affect availability.

Vulnerability class: Buffer Overflow

EPSS: 0.000 (0.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.7 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.

Affected products

Huawei Harmonyos — versions 6.0.0, 5.1.0

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

consumer.huawei.com/en/support/bulletin/2026/4/

Frequently asked questions

What is CVE-2026-34863?: CVE-2026-34863 is a medium-severity vulnerability in Huawei Harmonyos, classified under Out-of-bounds Write. CVSS score: 6.7/10. Published 2026-04-13.
How severe is CVE-2026-34863?: Medium severity. CVSS v3 base score is 6.7 out of 10.