CVE-2014-4971

HIGHCVSS v2 · 7.27.2—
EchelonGraph scoreLOW confidence

This CVE was only ever scored under CVSS v2.0. NVD CVSS v2.0 base 7.2 — v2 rates that HIGH (v2 bands: LOW 0.0–3.9 / MEDIUM 4.0–6.9 / HIGH 7.0–10.0; v2 has no CRITICAL band). Vector AV:L/AC:L/Au:N/C:C/I:C/A:C. CVSS v2 is an older, coarser metric than v3.1/v4.0 (no Scope, no User Interaction, no Attack Requirements), so it is not directly comparable to a v3 or v4 score. NVD has never re-scored this record under v3. EPSS predicts 23.0% exploitation probability in the next 30 days, which is reflected in EG Risk but does not lift the v2 base. Confidence: LOW.

Sources: epss, nvd_v2
Weaponized
7.2EG
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • Public exploit code is available (Metasploit, Exploit-DB (verified), epss top5pct, public exploit)
CISA-KEV: Not listedEPSS PROB: 23%CVSS v2: 7.2Exploit: Metasploit · Exploit-DB (verified) · epss top5pct · public exploitExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v2.0 (legacy)
7.2HIGHNVD never assigned a CVSS v3 rating to this CVE
EG Score
7.2(low)
EG Risk
63(Track)
EG Risk 63/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity72% × 45%
Exploitation65% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
23%
EPSS %ILE
98%
KEV
Not listed

Published

July 26, 2014

Last Modified

May 6, 2026

References (36)

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 6× in last 7d / 22× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 112 total refreshes for this CVE.

  1. 2026-08-21 23:44 UTCEPSS rescore
  2. 2026-08-20 22:50 UTCEPSS rescore
  3. 2026-08-19 16:59 UTCEPSS rescore
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  20. 2026-07-26 13:51 UTCEG score recompute▲ 7.20
  21. 2026-07-24 14:13 UTCEPSS rescore
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  23. 2026-07-23 01:13 UTCEG score recompute
  24. 2026-07-23 00:16 UTCEG score recompute
  25. 2026-07-22 21:55 UTCEG score recompute
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  1. 2026-07-22 14:04 UTCEPSS rescore
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  25. 2026-06-30 23:19 UTCEPSS rescore
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  48. 2026-06-14 23:14 UTCEPSS rescore
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  65. 2026-05-31 22:28 UTCEPSS rescore
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  69. 2026-05-29 13:41 UTCEPSS rescore
  70. 2026-05-28 17:49 UTCEG score recompute
  71. 2026-05-28 17:49 UTCGHSA enrichment
  72. 2026-05-28 13:42 UTCEPSS rescore
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  75. 2026-05-27 13:38 UTCEPSS rescore

Publicly available exploits

(6 references)

Working exploit code is in the public domain (2 Metasploit modules) (4 Exploit-DB entries). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Exploit-DBEDB-34982✓ verified
    First seen Oct 15, 2014

    Microsoft Bluetooth Personal Area Networking - 'BthPan.sys' Local Privilege Escalation (Metasploit)

    Open source ↗
  • Exploit-DBEDB-34167✓ verified
    First seen Jul 25, 2014

    Microsoft Windows XP SP3 - 'MQAC.sys' Arbitrary Write Privilege Escalation (Metasploit)

    Open source ↗
  • Metasploitexploit/windows/local/mqac_write✓ verified
    First seen Jul 22, 2014

    MQAC.sys Arbitrary Write Privilege Escalation

    Open source ↗
  • Exploit-DBEDB-34131
    First seen Jul 21, 2014

    Microsoft Windows XP SP3 - 'BthPan.sys' Arbitrary Write Privilege Escalation

    Open source ↗
  • Exploit-DBEDB-34112
    First seen Jul 19, 2014

    Microsoft Windows XP SP3 - 'MQAC.sys' Arbitrary Write Privilege Escalation

    Open source ↗
  • Metasploitexploit/windows/local/bthpan✓ verified
    First seen Jul 18, 2014

    MS14-062 Microsoft Bluetooth Personal Area Networking (BthPan.sys) Privilege Escalation

    Open source ↗

Frequently asked(4)

What is CVE-2014-4971?
CVE-2014-4971 is a high vulnerability published on July 26, 2014. 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…
When was CVE-2014-4971 disclosed?
CVE-2014-4971 was first published in the National Vulnerability Database on July 26, 2014, with the most recent update on May 6, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2014-4971 actively exploited?
CVE-2014-4971 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 23% probability of exploitation in the next 30 days, which ranks it in the top 2.4% of all scored CVEs.
How do I remediate CVE-2014-4971?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2014-4971, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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