Microsoft Internet Explorer 6, 7, and 8 does not properly handle objects in memory, which allows remote attackers to execute arbitrary code by accessing an object that (1) was not properly initialized or (2) is deleted, as demonstrated by Stephen Fewer as the first of three chained vulnerabilities during a Pwn2Own competition at CanSecWest 2011, aka "Object Management Memory Corruption Vulnerability."
Published Mar 10, 2011
9.3
HIGHCVSS 2.0
EPSS 40.88%
Description
Microsoft Internet Explorer 6, 7, and 8 does not properly handle objects in memory, which allows remote attackers to execute arbitrary code by accessing an object that (1) was not properly initialized or (2) is deleted, as demonstrated by Stephen Fewer as the first of three chained vulnerabilities during a Pwn2Own competition at CanSecWest 2011, aka "Object Management Memory Corruption Vulnerability."
Affected products
No data.
- 8
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
AV:N/AC:M/Au:N/C:C/I:C/A:C
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (15 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 40.88% (0.40875) | 98.62th | v5 (v2026.06.15) |
| Jun 15, 2026 | 40.88% (0.40875) | 98.47th | v5 (v2026.06.15) |
| Sep 9, 2025 | 50.60% (0.50604) | 97.77th | v4 (v2025.03.14) |
| Jun 4, 2025 | 47.82% (0.47819) | 97.55th | v4 (v2025.03.14) |
| Mar 30, 2025 | 52.90% (0.52897) | 97.73th | v4 (v2025.03.14) |
| Mar 29, 2025 | 40.41% (0.40410) | 96.03th | v4 (v2025.03.14) |
| Mar 19, 2025 | 52.90% (0.52897) | 97.64th | v4 (v2025.03.14) |
| Mar 17, 2025 | 56.40% (0.56403) | 97.89th | v4 (v2025.03.14) |
| Jan 26, 2025 | 91.79% (0.91787) | 99.18th | v3 (v2023.03.01) |
| Dec 17, 2024 | 92.83% (0.92825) | 99.25th | v3 (v2023.03.01) |
| Oct 29, 2023 | 94.95% (0.94952) | 99.05th | v3 (v2023.03.01) |
| Jul 17, 2023 | 94.45% (0.94447) | 98.85th | v3 (v2023.03.01) |
| Mar 7, 2023 | 93.77% (0.93765) | 98.56th | v3 (v2023.03.01) |
| Mar 6, 2023 | 67.16% (0.67160) | 99.09th | v2 (v2022.01.01) |
| Feb 4, 2022 | 67.16% (0.67160) | 98.89th | v2 (v2022.01.01) |
No CWE recorded.
References (12)
- http://dvlabs.tippingpoint.com/blog/2011/02/02/pwn2own-2011 x_refsource_MISC
- http://twitter.com/aaronportnoy/statuses/45642180118855680 x_refsource_MISC
- http://twitter.com/msftsecresponse/statuses/45646985998516224 x_refsource_MISC
- http://www.computerworld.com/s/article/9214002/Safari_IE_hacked_first_at_Pwn2Own x_refsource_MISC
- http://www.securityfocus.com/bid/46821 vdb-entryx_refsource_BID
- http://www.securitytracker.com/id?1025327 vdb-entryx_refsource_SECTRACK
- http://www.us-cert.gov/cas/techalerts/TA11-102A.html third-party-advisoryx_refsource_CERTUS Government Resource
- http://www.zdnet.com/blog/security/pwn2own-2011-ie8-on-windows-7-hijacked-with-3-vulnerabilities/8367 x_refsource_MISC
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-018 vendor-advisoryx_refsource_MS
- https://exchange.xforce.ibmcloud.com/vulnerabilities/66062 vdb-entryx_refsource_XF
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12228 vdb-entrysignaturex_refsource_OVAL
- https://threatpost.com/en_us/blogs/pwn2own-winner-stephen-fewer-031011 x_refsource_MISC
Change history (0)
No recorded changes yet.