Vulnerability record · CVE-2011-1243 · published 13 April 2011

CVE-2011-1243: Microsoft windows xp memory buffer overflow vulnerability

Microsoft · Windows Xp

The Windows Messenger ActiveX control in msgsc.dll in Microsoft Windows XP SP2 and SP3 allows remote attackers to execute arbitrary code via unspecified vectors that "corrupt the system state," aka "Microsoft Windows Messenger ActiveX Control Vulnerability."

9.3 CVSS 2.0 High EPSS 29% · top 1.9% CWE-119 · Memory buffer overflow

9.3CVSS 2.0 base score

29%EPSS exploitation probability, 30 days

NoNot in CISA KEV

1Affected product versions listed by NVD

10References

16 Jun 2026Last modified by NVD

Description

AV:N/AC:M/Au:N/C:C/I:C/A:C

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

Windows Xp Microsoft

References

Link	Tags
http://osvdb.org/71788
http://secunia.com/advisories/44159
http://www.securityfocus.com/bid/47197
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-027
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12524
http://osvdb.org/71788
http://secunia.com/advisories/44159
http://www.securityfocus.com/bid/47197
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-027
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12524

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2011-1243), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.