Huawei HarmonyOS CVE-2026-41965

The vulnerability requires the HarmonyOS web component to be active and network-accessible. High attack complexity (AC:H) indicates exploitation requires specific timing conditions, precise memory state, or race condition triggers that are difficult to reproduce reliably - attackers must either brute-force trigger conditions or possess deep knowledge of HarmonyOS memory management internals. No special authentication or user interaction is required (PR:N/UI:N), but successful exploitation is not guaranteed on each attempt due to the complexity factor. The use-after-free is triggered during web component processing, implying active web browsing or background web functionality must be operational.

The CVSS score of 5.6 with network attack vector (AV:N) and no privilege or user interaction requirements indicates a network-accessible vulnerability, but the high attack complexity (AC:H) significantly reduces real-world exploitation probability. The impact is limited across all three security dimensions (confidentiality, integrity, availability each marked 'Low'), making this a medium-risk issue rather than critical. EPSS score not provided in source data. Absence from CISA KEV listing and lack of public exploit code suggest this remains theoretical rather than actively weaponized. The information disclosure tag aligns with UAF memory leaks, but the low-impact ratings suggest only small amounts of sensitive data exposure are feasible. This is a priority for HarmonyOS device owners but lower urgency than high-CVSS vulnerabilities with network vector and low complexity. Real-world risk depends heavily on successful reproduction of the high-complexity trigger conditions.

An attacker sends a specially crafted network request to the HarmonyOS web component, triggering a race condition or specific memory management sequence that causes a use-after-free condition. The attacker repeats the trigger multiple times (high attack complexity requires iteration) to either leak sensitive information from freed memory regions or corrupt heap metadata, resulting in information disclosure or minor service disruption. No public proof-of-concept has been identified, making this scenario theoretical.