{"id":"CVE-2026-30332","aliases":["EUVD-2026-18350","GHSA-q22r-qqx4-x7hq"],"status":"published","title":"A Time-of-Check to Time-of-Use (TOCTOU) race condition vulnerability in Balena Etcher for Windows...","description":"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.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AC:H/AV:L/A:H/C:H/I:H/PR:L/S:C/UI:R","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00175,"percentile":0.07058,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":false},"cwes":["CWE-367"],"published":"2026-04-02T00:00:00Z","modified":"2026-10-28T02:31:09Z","exploits":[{"source":"pocgithub","id":"B1tBreaker/CVE-2026-30332","title":"B1tBreaker/CVE-2026-30332","date":"2026-04-01","url":"https://github.com/B1tBreaker/CVE-2026-30332"}],"references":[{"url":"https://github.com/balena-io/etcher/issues/4500","tags":["report"]},{"url":"https://www.balena.io/security","tags":["web"]},{"url":"https://github.com/B1tBreaker/CVE-2026-30332","tags":["package"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-30332","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-q22r-qqx4-x7hq"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/30xxx/CVE-2026-30332.json","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-30332","description":"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.","status":"published","published":"2026-04-02T00:00:00Z","modified":"2026-04-02T17:26:30.031Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AC:H/AV:L/A:H/C:H/I:H/PR:L/S:C/UI:R","level":"high","assessor":"cna"}],"cwes":["CWE-367"],"updated_at":"2026-11-02T13:43:56.024247Z"}],"euvd":[{"id":"EUVD-2026-18350","description":"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.","status":"published","published":"2026-04-02T00:00:00Z","modified":"2026-04-02T17:26:30Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AC:H/AV:L/A:H/C:H/I:H/PR:L/S:C/UI:R","level":"high"}],"updated_at":"2026-11-02T19:25:22.606516Z"}],"ghsa":[{"id":"GHSA-q22r-qqx4-x7hq","title":"A Time-of-Check to Time-of-Use (TOCTOU) race condition vulnerability in Balena Etcher for Windows...","description":"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.","status":"published","published":"2026-04-02T18:31:37Z","modified":"2026-04-02T18:31:45Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-367"],"updated_at":"2026-11-02T15:07:06.066601Z"}],"nvd":[{"id":"CVE-2026-30332","description":"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.","status":"published","published":"2026-04-02T16:16:22.05Z","modified":"2026-07-24T21:10:00.143Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-367"],"updated_at":"2026-11-02T14:12:12.73929Z"}],"osv":[{"id":"CVE-2026-30332","description":"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.","status":"published","published":"2026-04-02T00:00:00Z","modified":"2026-10-28T02:31:09.4727958Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AC:H/AV:L/A:H/C:H/I:H/PR:L/S:C/UI:R","level":"high"}],"updated_at":"2026-11-02T15:45:00.530889Z"}]}}