CVE-2025-52458
Published: 16 March 2026
Summary
CVE-2025-52458 is a medium-severity Out-of-bounds Write (CWE-787) vulnerability in Openatom Openharmony. Its CVSS base score is 5.5 (Medium).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation for Client Execution (T1203); ranked at the 0.5th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
The strongest mitigations our analysis identified are NIST 800-53 AC-6 (Least Privilege) and SI-16 (Memory Protection).
Deeper analysis
CVE-2025-52458 is an out-of-bounds write vulnerability (CWE-787) affecting OpenHarmony versions v5.1.0 and prior. It enables a local attacker to achieve arbitrary code execution within pre-installed applications. The issue has a CVSS v3.1 base score of 5.5 (AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N), indicating medium severity with high confidentiality impact but no integrity or availability disruption.
A local attacker with low privileges can exploit this vulnerability through an out-of-bounds write, leading to arbitrary code execution confined to pre-installed apps. Exploitation requires local access and is limited to restricted scenarios, with low attack complexity and no user interaction needed.
Mitigation details are provided in the official security disclosure advisory at https://gitcode.com/openharmony/security/tree/master/zh/security-disclosure/2025/2025-10.md. Security practitioners should consult this reference for patching instructions and workarounds specific to OpenHarmony deployments.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2025-208681
Vulnerability details
in OpenHarmony v5.1.0 and prior versions allow a local attacker arbitrary code execution in pre-installed apps through out-of-bounds write. This vulnerability can be exploited only in restricted scenarios.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Out-of-bounds write (memory corruption) in a local context directly enables arbitrary code execution with no user interaction, mapping to exploitation for client execution.
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Directly implements memory protection mechanisms that block out-of-bounds writes (CWE-787) from achieving arbitrary code execution.
Enforces least privilege so a local attacker (PR:L) cannot reach the code paths needed to exploit the vulnerability in pre-installed apps.
Requires prompt application of vendor patches that eliminate the out-of-bounds write flaw in OpenHarmony v5.1.0 and earlier.