by Kastro
Paper/Archive/CVE-2026-109423

CVE-2026-109423

NetEase NetEase Cloud Music for Windows — NetEase Cloud Music TLS Certificate Validation Bypass

EPSS 0.2%CVSS 9.1
critical.is priorityof 100
28
CVSS 9.1 (CNA)9.1 / 10 × 3027.3Not in CISA KEV+300.0EPSS percentile 4.6.046 × 200.9No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

NetEase Cloud Music client for Windows (cloudmusic.exe) versions 3.1.38 and 3.1.39.205426 contains a TLS certificate validation vulnerability that allows a network-adjacent attacker to intercept and decrypt HTTPS traffic by failing to validate the server certificate chain, verify the hostname, or consult any Windows certificate trust store. Attackers can perform a man-in-the-middle attack using a rogue certificate authority to decrypt traffic, capture the MUSIC_U session credential sent in authenticated API requests, and modify server responses in transit, enabling account takeover and transport-layer response forgery.

Affected

ProductAffectedFixed inSource
NetEase Cloud Music for Windows3.1.38–CNA
NetEase Cloud Music for Windows3.1.39.205426–CNA

Scores by source

VulnCheck (CNA)9.1CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
VulnCheck (CNA)7.4CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total

References

writeupgist.github.com/LeoWSY-hashblue/10e5383fc2d4d75faf74a9507c6bba9frefhr.163.com/product.html/musicwriteupvulncheck.com/advisories/netease-cloud-music-tls-certificate-validation-bypass