CVE-2014-4971

Exp

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.

Published: 2014-07-26 Last update: 2026-05-06 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2014-4971 is rated High Exploit Risk (77.5/100): CVSS High severity, with high exploitation likelihood (EPSS 23.05%, 97th percentile). 11 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2014-4971

EDB-ID Source Kind Published Link
34982 exploit_db edb 2014-10-15 Exploit-DB ↗
34167 exploit_db edb 2014-07-25 Exploit-DB ↗
34131 exploit_db edb 2014-07-21 Exploit-DB ↗
34112 exploit_db edb 2014-07-19 Exploit-DB ↗
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Exploit prediction scoring system (EPSS) score for CVE-2014-4971

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 23.44% 23.05% -0.40%
2 2026-05-11 18.67% 23.44% +4.77%
3 2026-01-03 — 18.67% —

Full EPSS history (14 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2014-4971

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.2 2.0 HIGH
AV:L/AC:L/Au:N/C:C/I:C/A:C Click to expand
Access vector (AV:L)
Requires local access to the target system.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
 3.9 10.0 [email protected]

Weakness enumeration for CVE-2014-4971

NVD evaluator notes for CVE-2014-4971

Comment: CWE-123: Write-what-where Condition <a href="http://cwe.mitre.org/data/definitions/123.html">CWE-123: Write-what-where Condition</a>

Affected software / configurations for CVE-2014-4971

Vendor Product Version Raw CPE
microsoft windows_xp — cpe:2.3:o:microsoft:windows_xp:*:sp3:*:*:*:*:*:*

References for CVE-2014-4971

URL Tags
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.html Exploit VDB 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 Advisory VDB 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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