How severe is CVE-2014-4979?

CVE-2014-4979 has a CVSS 2.0 base score of 9.3, rated critical severity.

Is CVE-2014-4979 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (89th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2014-4979?

CVE-2014-4979 affects Apple Quicktime. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2014-4979?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2014-4979 published?

CVE-2014-4979 was published on 2014-07-26 and last updated on 2026-06-17.

CVE-2014-4979

CVE-2014-4979 is a critical-severity vulnerability in Apple Quicktime with a CVSS 2.0 base score of 9.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-119.

Key facts

Severity: Critical (CVSS 2.0 base score 9.3)
EPSS exploit prediction: 4% (89th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Apple Quicktime
Published: 2014-07-26
Last modified: 2026-06-17

Description

Apple QuickTime allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a malformed version number and flags in an mvhd atom.

Frequently asked questions

What is CVE-2014-4979?: Apple QuickTime allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a malformed version number and flags in an mvhd atom.
How severe is CVE-2014-4979?: CVE-2014-4979 has a CVSS 2.0 base score of 9.3, rated critical severity.
Is CVE-2014-4979 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (89th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2014-4979?: CVE-2014-4979 affects Apple Quicktime. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2014-4979?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2014-4979 published?: CVE-2014-4979 was published on 2014-07-26 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:apple:quicktime:*:*:*:*:*:*:*:*

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