Vulnerability · Published Apr 13, 2026 · Assigned by huawei

CVE-2026-34865

Critical 10.0

In plain English

A critical-severity heap buffer overflow in HarmonyOS from Huawei. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 11% of all known vulnerabilities).

Severity (CVSS 4.0)10.0Critical

Exploit odds (30 days)0.2%top 88.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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

Affected products (as reported)

Vendor	Product	Versions
Huawei	HarmonyOS	6.0.0

Weakness: CWE-122 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

References

https://consumer.huawei.com/en/support/bulletinwearables/2026/4/