CVE-2026-25781 OpenHarmony CVE debrief

Who should care

Organizations deploying OpenHarmony-based systems, particularly in embedded or IoT environments where manual recovery may be difficult; system administrators managing OpenHarmony v6.0 or earlier installations; security teams monitoring for local privilege escalation or denial-of-service conditions; and developers building on OpenHarmony who need to understand memory safety requirements in the platform.

Technical summary

This vulnerability stems from an out-of-bounds write (CWE-787) in OpenHarmony v6.0 and earlier versions. A local attacker with low privileges can trigger the condition without user interaction, resulting in a denial-of-service state that the system cannot automatically recover from. The changed scope (S:C) in the CVSS vector indicates the vulnerable component can affect resources beyond its security scope. While the CVSS vector shows no availability impact (A:N), the CVE description explicitly states unrecoverable DOS, suggesting the scoring may not fully capture the availability impact or reflects a specific assessment of the vulnerability's characteristics. The deferred NVD status indicates the entry may be awaiting additional analysis or vendor confirmation.

Defensive priority

HIGH

Recommended defensive actions

• Review OpenHarmony security advisory at the referenced Gitcode disclosure for specific affected components and patch information
• Apply security updates from OpenHarmony when available, prioritizing systems running v6.0 or earlier
• Implement principle of least privilege to limit local attacker access
• Monitor for anomalous local process behavior that could indicate exploitation attempts
• Verify integrity of system state after any unexpected crashes, as recovery may require manual intervention
• Review memory safety controls and sandboxing for components processing untrusted local input

Evidence notes

The CVE description indicates this is a local attack vector affecting OpenHarmony v6.0 and prior versions. The CVSS vector (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N) shows local attack vector, low attack complexity, low privileges required, no user interaction, changed scope, high confidentiality and integrity impact, but notably no availability impact in the vector—despite the description stating DOS. This discrepancy may reflect scoring nuances or incomplete analysis. The weakness is CWE-787 (Out-of-bounds Write), suggesting memory corruption as the root cause. The vendor identification carries low confidence and requires review, as it is derived from reference domain analysis rather than explicit vendor attribution.

Official resources