CVE-2026-58557 Denial of service in HarmonyOS
A design defect in HarmonyOS Expedition mode allows attackers to disrupt system availability.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-58557?
CVE-2026-58557 is a medium-severity denial of service vulnerability in Huawei HarmonyOS, published on 15 Jul 2026. 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
Design defect vulnerability in Expedition mode. Impact: Successful exploitation of this vulnerability may affect availability.
Weakness: CWE-701
Which versions are affected by CVE-2026-58557?
How do I fix CVE-2026-58557?
No fix has been published for CVE-2026-58557 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-2026-58557 being exploited?
There is no known exploitation of CVE-2026-58557 in the wild and no public exploit code.
Sources
Also known as GHSA-fr78-wfr2-4mhm.