CVE-2011-0257
CriticalPublic exploitInteger signedness error in Apple QuickTime before 7.7 allows remote attackers to execute arbitrary code or cause a denial of service (application crash) via a crafted PnSize opcode in a PICT file that triggers a stack-based buffer overflow.
Published Aug 15, 2011 · Updated Apr 28, 2026
Key Facts
Patch immediately- CVE-2011-0257 is a critical-severity vulnerability (CVSS 9.3 v2) affecting Quicktime (Apple).
- It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
- EPSS estimates a 60% probability of exploitation in the next 30 days.
- Fixed versions are available, including Quicktime 7.6.9.
- Brandefense priority: patch immediately, because it is very likely to be exploited soon.
CVSS v2
9.3
AV:N/AC:M/Au:N/C:C/I:C/A:C
EPSS (30-day exploit likelihood)
60%
Higher than 99.1% of all scored CVEs
Exploited in the wild
No known
Not in a known-exploited catalog
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2011-0257 brief as a PDF
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Description
Integer signedness error in Apple QuickTime before 7.7 allows remote attackers to execute arbitrary code or cause a denial of service (application crash) via a crafted PnSize opcode in a PICT file that triggers a stack-based buffer overflow.
Affected Products
32 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| QuicktimeApple | 7.0.0, 7.0.1, 7.0.2, 7.0.3, 7.0.4, 7.1.0, 7.1.1, 7.1.2 | 7.6.9 |
Patched Releases
Quicktime
7.6.9
Timeline
Publicly disclosed
Aug 15, 2011
Last updated
Apr 28, 2026
Weakness Type
- CWE-189
References
- advisoryhttp://support.apple.com/kb/HT4826
- exploitMSF apple_quicktime_pnsize.rb
- exploitExploitDB-17777
- other8365
- otheroval:org.mitre.oval:def:16059
FAQ
Common Questions.
Integer signedness error in Apple QuickTime before 7.7 allows remote attackers to execute arbitrary code or cause a denial of service (application crash) via a crafted PnSize opcode in a PICT file that triggers a stack-based buffer overflow.
Affected: Quicktime (Apple) versions 7.0.0, 7.0.1, 7.0.2, 7.0.3, 7.0.4, 7.1.0, 7.1.1, 7.1.2. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
Fixed versions are available, including Quicktime 7.6.9.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.
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