CVE-2025-66323 Denial of service in HarmonyOS
Attackers can exploit improper security checks in the card module to disrupt system availability on HarmonyOS devices.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2025-66323?
CVE-2025-66323 is a medium-severity denial of service vulnerability in Huawei Harmonyos, published on 8 Dec 2025. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
Vulnerability of improper criterion security check in the card module. Impact: Successful exploitation of this vulnerability may affect availability.
Weakness: CWE-358
Which versions are affected by CVE-2025-66323?
It affects 1 product.
Products include Huawei Harmonyos.
How do I fix CVE-2025-66323?
No fix has been published for CVE-2025-66323 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2025-66323 being exploited?
There is no known exploitation of CVE-2025-66323 in the wild and no public exploit code.
Other vulnerabilities in Huawei Harmonyos
Sources
Also known as GHSA-cm7j-45w4-qf6v.