What is the CVSS score of CVE-2014-0322?

CVE-2014-0322 has a CVSS 3.1 base score of 8.8 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H. EPSS exploitation probability: 93.2%.

Is there a public PoC exploit available for CVE-2014-0322?

Yes, a public proof-of-concept exploit is available for CVE-2014-0322. Prioritise patching immediately. EPSS: 93.2%.

How to fix or mitigate CVE-2014-0322?

Within 24 hours: Identify all affected systems and apply vendor patches immediately. If patching is delayed, consider network segmentation to limit exposure.

Microsoft CVE-2014-0322

HIGH

Use After Free (CWE-416)

2014-02-14 secure@microsoft.com

RCE Use After Free Memory Corruption Microsoft

8.8

CVSS 3.1 · NVD

View

Vulnerability Assessment

Weakness	CWE CWE-416 OWASP Top 10:2025 A06:2021 - Vulnerable and Outdated Components ASVS 5.0 V14 - Configuration Dependency management, component inventory MITRE ATT&CK 2 techniques across 2 tactics: Execution, Privilege Escalation The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. Sign in to read
Impact	Critical risk at time of exploitation. Operation SnowMan compromised the Veterans of Foreign Wars (VFW) website to target US military personnel and defense contractors, attributed to Chinese APT groups (likely APT2/Putter Panda).
Exploit ScenarioDerived	The VFW website was compromised with an iframe loading the IE exploit. Military veterans and defense personnel visiting the site had their IE 9/10 browsers exploited, silently installing the ZxShell remote access trojan for espionage operations.

Act Now Prioritize within 24-48h. Why: In CISA KEV with patch available.

Exploited in the wild (CISA KEV) Patch available 93.2% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 26, 2026

Internet Explorer 9 and 10 contain a use-after-free vulnerability in CMarkup object handling exploitable via crafted JavaScript, used in 'Operation SnowMan' watering hole attacks targeting US military and defense in early 2014.

Earlier versions of this analysis (1)

v1 Mar 26, 2026 - 11:18 CVSS 8.8

A use-after-free in IE 9/10's handling of CMarkup objects and the onpropertychange event allows remote code execution. Exploited in the wild in January-February 2014 in the 'Operation SnowMan' campaign targeting US military veterans.

RemediationAI

Migrate to modern browsers. Apply Microsoft security update MS14-012. This was a key driver in the industry's push to deprecate legacy IE versions.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

The CWE-416 use-after-free is triggered through a sequence of JavaScript operations involving CMarkup objects and onpropertychange event handlers. By creating and destroying DOM elements in a specific pattern, the attacker causes a CMarkup object to be freed while still referenced, then uses heap spray to control the freed memory.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 8.8 HIGH

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Added to CISA KEV

Oct 22, 2025 - 01:15 cisa

CISA KEV

PoC Detected

Oct 22, 2025 - 01:15 vuln.today

Public exploit code

Patch released

Oct 22, 2025 - 01:15 nvd

Patch available

CVE Published

Feb 14, 2014 - 16:55 nvd

HIGH 8.8

DescriptionCVE.org

Use-after-free vulnerability in Microsoft Internet Explorer 9 and 10 allows remote attackers to execute arbitrary code via vectors involving crafted JavaScript code, CMarkup, and the onpropertychange attribute of a script element, as exploited in the wild in January and February 2014.

Executive ViewAI

Why It Matters

Organizations using Use-after-free vulnerability in Microsoft Internet Explorer 9 and 10 face significant risk from CVE-2014-0322, a use-after-free vulnerability rated CVSS 8.8. Successful exploitation could significantly impact the confidentiality, integrity, or availability of affected systems. This vulnerability is actively exploited in the wild (KEV-listed) and requires immediate remediation. A patch is available and should be applied as part of regular vulnerability management.

Business Impact: Severe

Compensating Controls

Apply vendor patch. If immediate patching is not feasible: (1) Enable ASLR and DEP where available; (2) Implement network segmentation; (3) Monitor for exploitation indicators.

Threat Intelligence Overview

Threat Score

9.6/10

Composite threat intelligence

EPSS Score

93.2%

Top 0% exploitable

Threat Intel

1 sources

Exploit

POC

Public exploit code exists

Data Quality

8 sources

Confidence: High

NVD

CVE.org

CISA KEV

EPSS POC (1) THREAT

Exploit-DB

VulDB

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity HIGH

CISA KEV Yes

Public POC Yes

EPSS 93.2%

Patch available Yes

Active threat Yes

Deciding rule

In CISA KEV with patch available

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived

Immediate

Exploitation· derived

Active

System Exposure· derived

Open

Automatable· derived

Human Impact

Very High

Priority Score

232

Low Medium High Critical

KEV: +50

EPSS: +93

CVSS: +44

PoC: +20

Weaponized: +15

Threat intel: +10

Gov advisory: 0

Attack Technique

Use After Free HIGH

Use-after-free vulnerabilities occur when a program continues to access memory through a pointer after that memory has been deallocated.

Memory Corruption HIGH

Memory corruption occurs when a program writes data beyond the boundaries of allocated memory regions or accesses memory in unintended ways, violating the integrity of the process's address space.

Remote Code Execution CRITICAL

Remote Code Execution represents the critical moment when an attacker successfully runs arbitrary code on a target system without physical access.