CVE-2016-5270

CriticalCVSS 9.8/10Last modified Jun 17, 2026

Description

Heap-based buffer overflow in the nsCaseTransformTextRunFactory::TransformString function in Mozilla Firefox before 49.0, Firefox ESR 45.x before 45.4, and Thunderbird < 45.4 allows remote attackers to cause a denial of service (boolean out-of-bounds write) or possibly have unspecified other impact via Unicode characters that are mishandled during text conversion.

Metrics

CVSS 3.0 9.8/10CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-119CWE-787

Affected software

No affected versions have been published.

Timeline

Published
Sep 22, 2016
Last modified
Jun 17, 2026
NVD status
Modified

Related CVEs from 2016

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CVE-2016-5270: Critical severity, CVSS 9.8 | Vulnix