CVE-2025-66327 Race condition in HarmonyOS

What is CVE-2025-66327?

CVE-2025-66327 is a high-severity vulnerability in Huawei Harmonyos, published on 8 Dec 2025. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

Race condition vulnerability in the network module. Impact: Successful exploitation of this vulnerability may affect service confidentiality.

Weakness: CWE-362

Which versions are affected by CVE-2025-66327?

It affects 1 product.

Products include Huawei Harmonyos.

How do I fix CVE-2025-66327?

No fix has been published for CVE-2025-66327 yet. Limit exposure of the affected software until one is available.

Is CVE-2025-66327 being exploited?

There is no known exploitation of CVE-2025-66327 in the wild and no public exploit code.

Other vulnerabilities in Huawei Harmonyos

• CVE-2026-34865 Memory corruption in HarmonyOS Critical 10.0
• CVE-2023-34157 Other in HarmonyOS Critical 10.0
• CVE-2023-41294 Denial of service in HarmonyOS Critical 9.8
• CVE-2022-48478 Denial of service in HarmonyOS Critical 9.8
• CVE-2022-48479 Memory corruption in HarmonyOS Critical 9.8

All Huawei Harmonyos vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-ff2g-h77x-2rm8.