CVE-2015-4477

NONECVSS 0.0

0.0

Use-after-free vulnerability in the MediaStream playback feature in Mozilla Firefox before 40.0 allows remote attackers to execute arbitrary code via unspecified use of the Web Audio API.

CVSS v3: —
EG Score: 0.0(none)
EPSS: 86.6%
KEV: Not listed

Published

August 16, 2015

Last Modified

May 6, 2026

References (24)

security@mozillahttp://lists.opensuse.org/opensuse-security-announce/2015-08/msg00014.html
security@mozillahttp://lists.opensuse.org/opensuse-security-announce/2015-08/msg00015.html
security@mozillahttp://lists.opensuse.org/opensuse-security-announce/2016-03/msg00089.html
security@mozillahttp://lists.opensuse.org/opensuse-security-announce/2016-03/msg00091.html
security@mozillahttp://www.mozilla.org/security/announce/2015/mfsa2015-81.html
security@mozillahttp://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
security@mozillahttp://www.securitytracker.com/id/1033247
security@mozillahttp://www.ubuntu.com/usn/USN-2702-1
security@mozillahttp://www.ubuntu.com/usn/USN-2702-2
security@mozillahttp://www.ubuntu.com/usn/USN-2702-3
security@mozillahttps://bugzilla.mozilla.org/show_bug.cgi?id=1179484
security@mozillahttps://security.gentoo.org/glsa/201605-06
af854a3a-2127-422b-91ae-364da2661108http://lists.opensuse.org/opensuse-security-announce/2015-08/msg00014.html
af854a3a-2127-422b-91ae-364da2661108http://lists.opensuse.org/opensuse-security-announce/2015-08/msg00015.html
af854a3a-2127-422b-91ae-364da2661108http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00089.html

Patch Availability(1)

Vendor / Ecosystem	Fixed in / Patch	Released	Source
ubuntu	firefox (40.0+build4-0ubuntu0.15.04.1) @ vivid	2026-05-23	ubuntu

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

UbuntuUSN-2702-1MEDIUM
Firefox vulnerabilities

Data Freshness Timeline

(refreshed 8× in last 7d / 20× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

2026-06-08 14:14 UTCEPSS rescore
2026-06-07 15:22 UTCEPSS rescore
2026-06-06 13:45 UTCEPSS rescore
2026-06-05 22:44 UTCEPSS rescore
2026-06-05 06:08 UTCEPSS rescore
2026-06-05 06:08 UTCEPSS rescore
2026-06-04 13:10 UTCEPSS rescore
2026-06-04 13:09 UTCEPSS rescore
2026-06-02 20:10 UTCEPSS rescore
2026-06-02 20:10 UTCEPSS rescore
2026-05-31 22:28 UTCEPSS rescore
2026-05-31 22:28 UTCEPSS rescore
2026-05-31 22:28 UTCEPSS rescore
2026-05-31 00:14 UTCEPSS rescore
2026-05-29 13:41 UTCEPSS rescore
2026-05-28 13:42 UTCEPSS rescore
2026-05-28 13:42 UTCEPSS rescore
2026-05-27 13:38 UTCEPSS rescore
2026-05-27 13:38 UTCEPSS rescore
2026-05-26 13:41 UTCEPSS rescore

Frequently asked(4)

What is CVE-2015-4477?

CVE-2015-4477 is a none vulnerability published on August 16, 2015. Use-after-free vulnerability in the MediaStream playback feature in Mozilla Firefox before 40.0 allows remote attackers to execute arbitrary code via unspecified use of the Web Audio API.

When was CVE-2015-4477 disclosed?

CVE-2015-4477 was first published in the National Vulnerability Database on August 16, 2015, with the most recent update on May 6, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2015-4477 actively exploited?

CVE-2015-4477 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 86.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

How do I remediate CVE-2015-4477?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2015-4477, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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