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Vulnerability record · CVE-2014-4971 · published 26 July 2014

CVE-2014-4971: Microsoft windows xp improper input validation vulnerability

Microsoft · Windows Xp

Microsoft Windows XP SP3 does not validate addresses in certain IRP handler routines, which allows local users to write data to arbitrary memory locations, and consequently gain privileges, via a crafted address in an IOCTL call, related to (1) the MQAC.sys driver in the MQ Access Control subsystem and (2) the BthPan.sys driver in the Bluetooth Personal Area Networking subsystem.

7.2 CVSS 2.0 High EPSS 23% · top 2.3% CWE-20 · Improper input validation
7.2CVSS 2.0 base score
23%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
36References, 14 tagged exploit
17 Jun 2026Last modified by NVD

Description

Microsoft Windows XP SP3 does not validate addresses in certain IRP handler routines, which allows local users to write data to arbitrary memory locations, and consequently gain privileges, via a crafted address in an IOCTL call, related to (1) the MQAC.sys driver in the MQ Access Control subsystem and (2) the BthPan.sys driver in the Bluetooth Personal Area Networking subsystem.

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

Affected products

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

References

LinkTags
http://blogs.technet.com/b/srd/archive/2014/10/14/accessing-risk-for-the-october-2014-security-updates.aspx Vendor Advisory
http://packetstormsecurity.com/files/127535/Microsoft-XP-SP3-BthPan.sys-Arbitrary-Write-Privilege-Escalation.html
http://packetstormsecurity.com/files/127536/Microsoft-XP-SP3-MQAC.sys-Arbitrary-Write-Privilege-Escalation.html
http://packetstormsecurity.com/files/128674/Microsoft-Bluetooth-Personal-Area-Networking-BthPan.sys-Privilege-Escalation ExploitVDB Entry
http://seclists.org/fulldisclosure/2014/Jul/96 Exploit
http://seclists.org/fulldisclosure/2014/Jul/97 Exploit
http://secunia.com/advisories/60974 Permissions Required
http://www.exploit-db.com/exploits/34112 Exploit
http://www.exploit-db.com/exploits/34131
http://www.exploit-db.com/exploits/34982 Exploit
http://www.osvdb.org/109387 Broken Link
http://www.securityfocus.com/archive/1/532843/100/0/threaded
http://www.securityfocus.com/archive/1/532844/100/0/threaded
http://www.securityfocus.com/bid/68764
http://www.securitytracker.com/id/1031025 Third Party AdvisoryVDB Entry
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2014/ms14-062
https://www.korelogic.com/Resources/Advisories/KL-001-2014-002.txt Exploit
https://www.korelogic.com/Resources/Advisories/KL-001-2014-003.txt Exploit
http://blogs.technet.com/b/srd/archive/2014/10/14/accessing-risk-for-the-october-2014-security-updates.aspx Vendor Advisory
http://packetstormsecurity.com/files/127535/Microsoft-XP-SP3-BthPan.sys-Arbitrary-Write-Privilege-Escalation.html
http://packetstormsecurity.com/files/127536/Microsoft-XP-SP3-MQAC.sys-Arbitrary-Write-Privilege-Escalation.html
http://packetstormsecurity.com/files/128674/Microsoft-Bluetooth-Personal-Area-Networking-BthPan.sys-Privilege-Escalation ExploitVDB Entry
http://seclists.org/fulldisclosure/2014/Jul/96 Exploit
http://seclists.org/fulldisclosure/2014/Jul/97 Exploit
http://secunia.com/advisories/60974 Permissions Required
http://www.exploit-db.com/exploits/34112 Exploit
http://www.exploit-db.com/exploits/34131
http://www.exploit-db.com/exploits/34982 Exploit
http://www.osvdb.org/109387 Broken Link
http://www.securityfocus.com/archive/1/532843/100/0/threaded
http://www.securityfocus.com/archive/1/532844/100/0/threaded
http://www.securityfocus.com/bid/68764
http://www.securitytracker.com/id/1031025 Third Party AdvisoryVDB Entry
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2014/ms14-062
https://www.korelogic.com/Resources/Advisories/KL-001-2014-002.txt Exploit
https://www.korelogic.com/Resources/Advisories/KL-001-2014-003.txt Exploit

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Source: NIST National Vulnerability Database (record CVE-2014-4971), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.