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Vulnerability record · CVE-2011-0663 · published 13 April 2011

CVE-2011-0663: Microsoft jscript integer overflow vulnerability

Microsoft · Jscript

Multiple integer overflows in the Microsoft (1) JScript 5.6 through 5.8 and (2) VBScript 5.6 through 5.8 scripting engines allow remote attackers to execute arbitrary code via a crafted web page, aka "Scripting Memory Reallocation Vulnerability."

8.8 CVSS 3.1 High EPSS 26% · top 2.1% CWE-189 · CWE-189CWE-190 · Integer overflow
8.8CVSS 3.1 base score, v2 9.3
26%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
16References
16 Jun 2026Last modified by NVD

Description

Multiple integer overflows in the Microsoft (1) JScript 5.6 through 5.8 and (2) VBScript 5.6 through 5.8 scripting engines allow remote attackers to execute arbitrary code via a crafted web page, aka "Scripting Memory Reallocation Vulnerability."

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

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

References

LinkTags
http://osvdb.org/71774
http://secunia.com/advisories/44162
http://www.securityfocus.com/bid/47249
http://www.securitytracker.com/id?1025333
http://www.us-cert.gov/cas/techalerts/TA11-102A.html US Government Resource
http://www.vupen.com/english/advisories/2011/0949
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-031
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12673
http://osvdb.org/71774
http://secunia.com/advisories/44162
http://www.securityfocus.com/bid/47249
http://www.securitytracker.com/id?1025333
http://www.us-cert.gov/cas/techalerts/TA11-102A.html US Government Resource
http://www.vupen.com/english/advisories/2011/0949
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-031
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12673

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Related vulnerabilities

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

7.5CVE-2016-0189Microsoft JScript and VBScript engines memory corruption in Internet ExplorerThe JScript 5.8 and VBScript 5.7/5.8 engines used by Internet Explorer 9 through 11 contain an out-of-bounds write that corrupts memory when a crafte…KEVEPSS 94%analysed9.3CVE-2015-6136Microsoft jscript memory buffer overflow vulnerabilityThe Microsoft (1) VBScript 5.7 and 5.8 and (2) JScript 5.7 and 5.8 engines, as used in Internet Explorer 8 through 11 and other products, allow remot…EPSS 25%9.3CVE-2015-6089Microsoft jscript memory buffer overflow vulnerabilityThe Microsoft (1) VBScript and (2) JScript engines, as used in Internet Explorer 8 through 11, allow remote attackers to execute arbitrary code or ca…EPSS 13%9.3CVE-2015-6056Microsoft jscript memory buffer overflow vulnerabilityThe (1) JScript and (2) VBScript engines in Microsoft Internet Explorer 9 through 11 allow remote attackers to execute arbitrary code or cause a deni…EPSS 13%9.3CVE-2015-6055Microsoft jscript memory buffer overflow vulnerabilityThe Microsoft (1) VBScript 5.7 and 5.8 and (2) JScript 5.7 and 5.8 engines, as used in Internet Explorer 8 through 11 and other products, allow remot…EPSS 25%9.3CVE-2015-2482Microsoft jscript memory buffer overflow vulnerabilityThe Microsoft (1) VBScript 5.7 and 5.8 and (2) JScript 5.7 and 5.8 engines, as used in Internet Explorer 8 through 11 and other products, allow remot…EPSS 32%9.3CVE-2015-2372Microsoft vbscript memory buffer overflow vulnerabilityvbscript.dll in Microsoft VBScript 5.6 through 5.8, as used with Internet Explorer 6 through 11 and other products, allows remote attackers to execut…EPSS 20%9.3CVE-2015-0032Microsoft vbscript vulnerabilityvbscript.dll in Microsoft VBScript 5.6 through 5.8, as used with Internet Explorer 8 through 11 and other products, allows remote attackers to execut…EPSS 22%

Source: NIST National Vulnerability Database (record CVE-2011-0663), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.