CVE-2026-30332

EUVD-2026-18350
A Time-of-Check to Time-of-Use (TOCTOU) race condition vulnerability in Balena Etcher for Windows prior to v2.1.4 allows attackers to escalate privileges and execute arbitrary code via replacing a legitimate script with a crafted payload during the flashing process.
TOCTOU
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
7.5 HIGH
LOCAL
HIGH
LOW
CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H
mitreCNA
7.5 HIGH
LOCAL
HIGH
LOW
CVSS:3.1/AC:H/AV:L/A:H/C:H/I:H/PR:L/S:C/UI:R
Awaiting analysis
This vulnerability is currently awaiting analysis.
Base Score
CVSS 3.x
EPSS Score
Percentile: Unknown
Common Weakness Enumeration
References
https://github.com/B1tBreaker/CVE-2026-30332
https://github.com/balena-io/etcher/issues/4500
https://www.balena.io/security