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Case File

CVE-2012-5839

HIGH · CVSS 9.3 EPSS 7.00%

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2012-11-21 · Last synced 2026-08-04

CyberRota Analysis

This is a high severity vulnerability with a CVSS score of 9.3. It affects Firefox. It may be remotely exploitable.

CVE
CVE-2012-5839
Severity
HIGH
CVSS
9.3
EPSS
7.00%
Firefox

Original NVD Description

Heap-based buffer overflow in the gfxShapedWord::CompressedGlyph::IsClusterStart function in Mozilla Firefox before 17.0, Firefox ESR 10.x before 10.0.11, Thunderbird before 17.0, Thunderbird ESR 10.x before 10.0.11, and SeaMonkey before 2.14 allows remote attackers to execute arbitrary code via unspecified vectors.