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Vulnerability record · CVE-2006-5270 · published 13 February 2007

CVE-2006-5270: Microsoft antigen vulnerability

Microsoft · Antigen

Integer overflow in the Microsoft Malware Protection Engine (mpengine.dll), as used by Windows Live OneCare, Antigen, Defender, and Forefront Security, allows user-assisted remote attackers to execute arbitrary code via a crafted PDF file.

9.3 CVSS 2.0 High EPSS 30% · top 1.8%
9.3CVSS 2.0 base score
30%EPSS exploitation probability, 30 days
NoNot in CISA KEV
5Affected product versions listed by NVD
16References
16 Jun 2026Last modified by NVD

Description

Integer overflow in the Microsoft Malware Protection Engine (mpengine.dll), as used by Windows Live OneCare, Antigen, Defender, and Forefront Security, allows user-assisted remote attackers to execute arbitrary code via a crafted PDF file.

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

Affected products

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

References

LinkTags
http://secunia.com/advisories/24146
http://www.kb.cert.org/vuls/id/511577 US Government Resource
http://www.osvdb.org/31888
http://www.securityfocus.com/bid/22479
http://www.securitytracker.com/id?1017636
http://www.us-cert.gov/cas/techalerts/TA07-044A.html US Government Resource
http://www.vupen.com/english/advisories/2007/0579
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2007/ms07-010
http://secunia.com/advisories/24146
http://www.kb.cert.org/vuls/id/511577 US Government Resource
http://www.osvdb.org/31888
http://www.securityfocus.com/bid/22479
http://www.securitytracker.com/id?1017636
http://www.us-cert.gov/cas/techalerts/TA07-044A.html US Government Resource
http://www.vupen.com/english/advisories/2007/0579
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2007/ms07-010

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Related vulnerabilities

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

7.8CVE-2026-41091Microsoft Defender link following allows local privilege elevationMicrosoft Defender's malware protection engine resolves links improperly before accessing files, a link-following flaw (CWE-59). A local attacker wit…KEVEPSS 0.44%analysed7.8CVE-2021-1647Microsoft Defender Remote Code Execution VulnerabilityCVE-2021-1647 is a remote code execution flaw in Microsoft Defender, the built-in antivirus and endpoint protection component of Windows, as well as …KEVEPSS 39%analysed7.8CVE-2017-8540Microsoft Malware Protection Engine out-of-bounds write via crafted fileThe Microsoft Malware Protection Engine, used by Windows Defender, Forefront, Security Essentials, System Center Endpoint Protection, Intune Endpoint…KEVEPSS 72%analysed9.3CVE-2013-1346Microsoft malware protection engine memory buffer overflow vulnerabilitympengine.dll in Microsoft Malware Protection Engine before 1.1.9506.0 on x64 platforms allows remote attackers to execute arbitrary code or cause a d…EPSS 12%8.8CVE-2018-0986Microsoft Malware Protection Engine out-of-bounds write enables remote code executionThe Microsoft Malware Protection Engine mishandles a specially crafted file during scanning, causing an out-of-bounds write and memory corruption. Be…EPSS 63%analysed8.1CVE-2026-45584Microsoft malware protection engine heap-based buffer overflow vulnerabilityHeap-based buffer overflow in Microsoft Defender allows an unauthorized attacker to execute code over a network.EPSS 0.71%7.8CVE-2026-69414Microsoft malware protection engine improper access control vulnerabilityMicrosoft is aware of an elevation of privilege in the Microsoft Malware Protection Engine in Microsoft Defender publicly referred to as "Shield…EPSS 0.33%7.8CVE-2026-55012Microsoft malware protection engine heap-based buffer overflow vulnerabilityInteger overflow or wraparound in Microsoft Defender allows an unauthorized attacker to execute code locally.EPSS 0.47%

Source: NIST National Vulnerability Database (record CVE-2006-5270), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.