CVE-2015-4486

Status: ModifiedHigh (10)—
The decrease_ref_count function in libvpx in Mozilla Firefox before 40.0 and Firefox ESR 38.x before 38.2 allows remote attackers to execute arbitrary code or cause a denial of service (out-of-bounds read) via malformed WebM video data.
CVSS

Version: 2.0
Vector: AV:N/AC:L/Au:N/C:C/I:C/A:C
Base score: 10
Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 6.61%
Percentile among all scored CVEs: 94
Score date: 10/7/2026
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).
Affected technologies (4)

Canonical — Ubuntu Linux Mozilla — Firefox Opensuse — Opensuse Oracle — Solaris
CWEs

CWE-119
References

Raw JSON (NVD)

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  "id": "CVE-2015-4486",
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