How severe is CVE-2009-0955?

CVE-2009-0955 has a CVSS 2.0 base score of 9.3, rated critical severity.

Is CVE-2009-0955 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 9% (95th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-0955?

CVE-2009-0955 primarily affects Apple Quicktime. In total, 125 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2009-0955?

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-2009-0955 published?

CVE-2009-0955 was published on 2009-06-02 and last updated on 2026-06-16.

CVE-2009-0955

CVE-2009-0955 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-94.

Key facts

Severity: Critical (CVSS 2.0 base score 9.3)
EPSS exploit prediction: 9% (95th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-94
Affected product: Apple Quicktime
Published: 2009-06-02
Last modified: 2026-06-16

Description

Apple QuickTime before 7.6.2 allows remote attackers to execute arbitrary code or cause a denial of service (application crash) via crafted image description atoms in an Apple video file, related to a "sign extension issue."

Frequently asked questions

What is CVE-2009-0955?: Apple QuickTime before 7.6.2 allows remote attackers to execute arbitrary code or cause a denial of service (application crash) via crafted image description atoms in an Apple video file, related to a "sign extension issue."
How severe is CVE-2009-0955?: CVE-2009-0955 has a CVSS 2.0 base score of 9.3, rated critical severity.
Is CVE-2009-0955 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 9% (95th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-0955?: CVE-2009-0955 primarily affects Apple Quicktime. In total, 125 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2009-0955?: 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-2009-0955 published?: CVE-2009-0955 was published on 2009-06-02 and last updated on 2026-06-16.

References

Affected products (125)

cpe:2.3:a:apple:quicktime:*:-:mac:*:*:*:*:*
cpe:2.3:a:apple:quicktime:*:-:windows:*:*:*:*:*
cpe:2.3:a:apple:quicktime:-:*:*:*:*:*:*:*
cpe:2.3:a:apple:quicktime:3.0:*:*:*:*:*:*:*
cpe:2.3:a:apple:quicktime:4.1.2:*:*:*:*:*:*:*
cpe:2.3:a:apple:quicktime:4.1.2:-:mac:*:*:*:*:*
cpe:2.3:a:apple:quicktime:4.1.2:-:windows:*:*:*:*:*
cpe:2.3:a:apple:quicktime:5.0:*:*:*:*:*:*:*
cpe:2.3:a:apple:quicktime:5.0.1:*:*:*:*:*:*:*
cpe:2.3:a:apple:quicktime:5.0.1:-:mac:*:*:*:*:*
cpe:2.3:a:apple:quicktime:5.0.1:-:windows:*:*:*:*:*
cpe:2.3:a:apple:quicktime:5.0.2:*:*:*:*:*:*:*
cpe:2.3:a:apple:quicktime:5.0.2:-:mac:*:*:*:*:*
cpe:2.3:a:apple:quicktime:5.0.2:-:windows:*:*:*:*:*
cpe:2.3:a:apple:quicktime:6.0:*:*:*:*:*:*:*
cpe:2.3:a:apple:quicktime:6.0:-:windows:*:*:*:*:*
cpe:2.3:a:apple:quicktime:6.0.0:*:*:*:*:*:*:*
cpe:2.3:a:apple:quicktime:6.0.0:-:mac:*:*:*:*:*
cpe:2.3:a:apple:quicktime:6.0.0:-:windows:*:*:*:*:*
cpe:2.3:a:apple:quicktime:6.0.1:*:*:*:*:*:*:*
cpe:2.3:a:apple:quicktime:6.0.1:-:mac:*:*:*:*:*
cpe:2.3:a:apple:quicktime:6.0.1:-:windows:*:*:*:*:*
cpe:2.3:a:apple:quicktime:6.0.2:*:*:*:*:*:*:*
cpe:2.3:a:apple:quicktime:6.0.2:-:mac:*:*:*:*:*
cpe:2.3:a:apple:quicktime:6.0.2:-:windows:*:*:*:*:*
cpe:2.3:a:apple:quicktime:6.1:*:*:*:*:*:*:*
cpe:2.3:a:apple:quicktime:6.1.0:*:*:*:*:*:*:*
cpe:2.3:a:apple:quicktime:6.1.0:-:mac:*:*:*:*:*
cpe:2.3:a:apple:quicktime:6.1.0:-:windows:*:*:*:*:*
cpe:2.3:a:apple:quicktime:6.1.1:*:*:*:*:*:*:*
cpe:2.3:a:apple:quicktime:6.1.1:-:mac:*:*:*:*:*
cpe:2.3:a:apple:quicktime:6.1.1:-:windows:*:*:*:*:*
cpe:2.3:a:apple:quicktime:6.2.0:*:*:*:*:*:*:*
cpe:2.3:a:apple:quicktime:6.2.0:-:mac:*:*:*:*:*
cpe:2.3:a:apple:quicktime:6.2.0:-:windows:*:*:*:*:*
cpe:2.3:a:apple:quicktime:6.3.0:*:*:*:*:*:*:*
cpe:2.3:a:apple:quicktime:6.3.0:-:mac:*:*:*:*:*
cpe:2.3:a:apple:quicktime:6.3.0:-:windows:*:*:*:*:*
cpe:2.3:a:apple:quicktime:6.4.0:*:*:*:*:*:*:*
cpe:2.3:a:apple:quicktime:6.4.0:-:mac:*:*:*:*:*

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