Huawei HarmonyOS CVE-2026-41986

Physical access to the target HarmonyOS device is required - the CVSS vector AV:P (Physical) is the dominant limiting condition, meaning the attacker must be in direct physical contact with or in direct physical proximity to the device to interact with the vulnerable file system component. No privileges are required (PR:N) and no user interaction is needed (UI:N), meaning a physically present attacker does not need to be logged in or trick a user into an action. Exploitation is constrained exclusively to availability impact (A:L); confidentiality and integrity are unaffected (C:N, I:N). There is no indication of a required non-default configuration or specific feature enablement - the vulnerability appears to exist in core file system logic. The physical access requirement is the single most significant barrier limiting real-world exploitation.

Real-world risk is low. The CVSS base score of 2.4 is well-supported by the vector components: AV:P mandates physical device access, drastically limiting the attacker population; A:L indicates only minor, partial availability disruption; C:N and I:N confirm no data exposure or data modification is possible. EPSS data was not provided in the intelligence feed, but given the physical access requirement and low CVSS, exploitation probability in the wild would be expected to be minimal. The vulnerability is not listed in CISA KEV and no proof-of-concept code has been identified, further reducing urgency. The tags 'Authentication Bypass' and the CVSS PR:N (no privileges required) together suggest that while no credentials are needed, the physical access barrier effectively substitutes as a strong access control. This is not a remote, mass-exploitation candidate. The primary concern would be an adversary with hands-on access to an unattended HarmonyOS device - a scenario relevant to physical security posture rather than network-perimeter defense.

An attacker with physical access to a HarmonyOS device - for example, an unattended mobile phone or laptop - interacts with the file system in a manner that supplies malformed or boundary-violating input to a loop-controlled file system routine, exploiting the CWE-606 logic bypass. This causes the file system operation to behave unexpectedly, resulting in a partial availability disruption such as a service crash or temporary inaccessibility of file system functions. No public proof-of-concept code has been identified, and the attack requires sustained physical presence with the device.