CVE-2009-1043
CVE-2009-1043 is a critical-severity vulnerability in Microsoft Internet Explorer with a CVSS 2.0 base score of 10.0. Its EPSS exploit-prediction score of 31% places it in the 98th percentile, indicating an elevated likelihood of exploitation.
Key facts
- Severity: Critical (CVSS 2.0 base score 10.0)
- EPSS exploit prediction: 31% (98th percentile)
- Actively exploited: Not listed in CISA KEV
- Affected product: Microsoft Internet Explorer
- Published:
- Last modified:
Description
Unspecified vulnerability in Microsoft Internet Explorer 8 on Windows 7 allows remote attackers to execute arbitrary code via unknown vectors triggered by clicking on a link, as demonstrated by Nils during a PWN2OWN competition at CanSecWest 2009.
Frequently asked questions
- What is CVE-2009-1043?
- Unspecified vulnerability in Microsoft Internet Explorer 8 on Windows 7 allows remote attackers to execute arbitrary code via unknown vectors triggered by clicking on a link, as demonstrated by Nils during a PWN2OWN competition at CanSecWest 2009.
- How severe is CVE-2009-1043?
- CVE-2009-1043 has a CVSS 2.0 base score of 10.0, rated critical severity.
- Is CVE-2009-1043 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 31% (98th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2009-1043?
- CVE-2009-1043 affects Microsoft Internet Explorer. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2009-1043?
- 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-2009-1043 published?
- CVE-2009-1043 was published on 2009-03-23 and last updated on 2026-06-16.
References
- http://blogs.zdnet.com/security/?p=2934
- http://cansecwest.com/index.html
- http://dvlabs.tippingpoint.com/blog/2009/02/25/pwn2own-2009
- http://dvlabs.tippingpoint.com/blog/2009/03/18/pwn2own-2009-day-1---safari-internet-explorer-and-firefox-taken-down-by-four-zero-day-exploits
- http://dvlabs.tippingpoint.com/blog/2009/03/20/pwn2own-day-2
- http://news.cnet.com/8301-1009_3-10199652-83.html
- http://osvdb.org/52892
- http://www.h-online.com/security/Pwn2Own-2009-Safari-IE-8-and-Firefox-exploited--/news/112889
- http://www.securityfocus.com/bid/34182
- http://www.securitytracker.com/id?1021880
- https://exchange.xforce.ibmcloud.com/vulnerabilities/49389
Affected products (1)
- cpe:2.3:a:microsoft:internet_explorer:8:*:*:*:*:*:*:*
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