What is CVE-2025-66324?

CVE-2025-66324 is a high-severity vulnerability in Huawei Harmonyos, classified under Improper Privilege Management. CVSS score: 8.4/10. Published 2025-12-08.

How severe is CVE-2025-66324?

High severity. CVSS v3 base score is 8.4 out of 10.

Privilege escalation in Huawei Harmonyos

CVE-2025-66324

Input verification vulnerability in the compression and decompression module. Impact: Successful exploitation of this vulnerability may affect app data integrity.

Vulnerability class: Privilege Escalation

Published 2025-12-08 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.4 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.001 (0.4th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 0th percentile — 0.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: +0.000

Affected products

Huawei Harmonyos — versions 5.1.0, 5.0.1

Weakness classification (CWE)

CWE-269 — Improper Privilege Management

References

consumer.huawei.com/en/support/bulletin/2025/12/ (Vendor Advisory)

Frequently asked questions

What is CVE-2025-66324?: CVE-2025-66324 is a high-severity vulnerability in Huawei Harmonyos, classified under Improper Privilege Management. CVSS score: 8.4/10. Published 2025-12-08.
How severe is CVE-2025-66324?: High severity. CVSS v3 base score is 8.4 out of 10.