CVE-2009-2479

Status: ModifiedHigh (7.8)—💥 Exploit

Mozilla Firefox 3.0.x, 3.5, and 3.5.1 on Windows allows remote attackers to cause a denial of service (uncaught exception and application crash) via a long Unicode string argument to the write method. NOTE: this was originally reported as a stack-based buffer overflow. NOTE: on Linux and Mac OS X, a crash resulting from this long string reportedly occurs in an operating-system library, not in Firefox.

CVSS

Version: 2.0
Vector: AV:N/AC:L/Au:N/C:N/I:N/A:C
Base score: 7.8

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 12%
Percentile among all scored CVEs: 96
Score date: 10/14/2026

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

💥 Public exploits

Exploit code or detection templates are publicly available. This is not the same as confirmed active exploitation (KEV), but it raises the risk: patch with priority.

Published on Exploit-DB · Mozilla Firefox 3.5 - Unicode Remote Buffer Overflow (PoC) (7/15/2009)

Affected technologies (1)

Mozilla — Firefox

CWEs

CWE-119

References

Raw JSON (NVD)

Show

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