Vulnerability in Netease Cloud Music For Windows
CVE-2026-109424
NetEase Cloud Music client for Windows (cloudmusic.exe) versions 3.1.38 and 3.1.39.205426 contains a weak encryption vulnerability where /eapi/ and /xeapi/ API response bodies are decrypted using a fixed, publicly documented AES-128-ECB key with no integrity credential. Attackers who can intercept or originate server responses can construct valid ciphertext under the known key with PKCS#7 padding, enabling the client to accept forged API responses that serve as a prerequisite for further exploitation such as reaching the os.navigateExternal bridge.
Published .
CVSS v3 metric
CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- Netease Cloud Music For Windows — versions 3.1.38, 3.1.39.205426
Weakness classification (CWE)
References
- gist.github.com/LeoWSY-hashblue/10e5383fc2d4d75faf74a9507c6bba9f (technical-description)
- hr.163.com/product.html/music (product)
- www.vulncheck.com/advisories/netease-cloud-music-weak-encryption-via-eapi-xeapi (third-party-advisory)
Frequently asked questions
- What is CVE-2026-109424?
- CVE-2026-109424 is a medium-severity vulnerability in Netease Cloud Music For Windows, classified under Use of Hard-coded Cryptographic Key. CVSS score: 5.9/10. Published 2026-10-12.
- How severe is CVE-2026-109424?
- Medium severity. CVSS v3 base score is 5.9 out of 10.