# CVE-2026-81646: Huawei HarmonyOS out-of-bounds read in graphics module

Source: https://junglewise.ai/threats/cve-2026-81646-huawei-harmonyos-out-of-bounds-read-in-graphics-module  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-09. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-81646 · Severity: medium · CVSS 5.9 · Published 2026-09-09

HarmonyOS is Huawei's operating system for smartphones, tablets, and PCs. An out-of-bounds read vulnerability in the graphics rendering module could allow an attacker to crash the system or leak sensitive memory contents, potentially affecting system availability and data confidentiality.

Technologies: [Huawei Harmonyos](https://junglewise.ai/threats/technologies/harmonyos). Vendors: [Huawei](https://junglewise.ai/threats/vendors/huawei).

## Quick answers

**Is CVE-2026-81646 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-81646 being exploited in the wild.

**How severe is CVE-2026-81646?** Medium severity, with a CVSS score of 5.9, published 9 September 2026.

**Which products and versions are affected?** Huawei Harmonyos 6.1.0.

**Is there a fix for CVE-2026-81646?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-81646 attacked?** It is attacked with local access.

**Am I affected by CVE-2026-81646?** Check whether you run Huawei Harmonyos at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

An out-of-bounds read vulnerability exists in the graphics module of HarmonyOS, allowing memory beyond allocated buffers to be read. The vulnerability is triggered during graphics processing operations and requires no special authentication or user interaction. Successful exploitation can lead to denial of service (system crash) or information disclosure through memory leakage. This affects HarmonyOS 6.1.0, and patches are available through Huawei's monthly security updates.

## Affected products

- Huawei HarmonyOS 6.1.0

## Timeline

- 2026-09-09: disclosed: Published in Huawei security bulletin for September 2026
- 2026-09-05: advisory: Security bulletin updated on this date

## References

- [https://consumer.huawei.com/en/support/bulletin/2026/9/](https://consumer.huawei.com/en/support/bulletin/2026/9/)
- [https://consumer.huawei.com/en/support/bulletinlaptops/2026/9/](https://consumer.huawei.com/en/support/bulletinlaptops/2026/9/)

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