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Word CVE-2016-7234

HIGH
Buffer Overflow (CWE-119)
2016-11-10 secure@microsoft.com
RCE Buffer Overflow Microsoft Office Sharepoint Server Word Office Compatibility Pack Office Web Apps Excel For Mac Word For Mac
7.8
CVSS 3.0 · NVD
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Vulnerability Assessment

Weakness
CWE
CWE-119
ASVS 5.0
V15 - Secure Coding and Architecture Bounds checking, buffer size validation
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.

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Impact

CVSS score of 7.8 (HIGH). Attack characteristics: local attack vector, low complexity, no privileges required, user interaction required. EPSS exploitation probability: 48.35%.
Exploit ScenarioDerived

A local attacker with access to the system could corrupt memory to execute arbitrary code or crash the application. No authentication is required to exploit this vulnerability.
Act Now Prioritize within 24-48h. Why: HIGH severity + EPSS > 10%.
No patch listed yet 48.4% exploitation probability (EPSS)

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AnalysisAI

Microsoft Word 2007, Office 2010 SP2, Word 2010 SP2, Word 2013 SP1, Word 2013 RT SP1, Word for Mac 2011, Excel for Mac 2011, Word 2016 for Mac, Office Compatibility Pack SP3, Word Automation Services. Rated high severity (CVSS 7.8), this vulnerability is no authentication required, low attack complexity. Epss exploitation probability 48.4% and no vendor patch available.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Use memory-safe languages or bounds-checking. Enable ASLR, DEP/NX, stack canaries. Use safe string functions.

Affects your stack

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Technical ContextAI · show details

This vulnerability is classified as Buffer Overflow (CWE-119), which allows attackers to corrupt memory to execute arbitrary code or crash the application. Microsoft Word 2007, Office 2010 SP2, Word 2010 SP2, Word 2013 SP1, Word 2013 RT SP1, Word for Mac 2011, Excel for Mac 2011, Word 2016 for Mac, Office Compatibility Pack SP3, Word Automation Services on SharePoint Server 2010 SP2, Word Automation Services on SharePoint Server 2013 SP1, Office Web Apps 2010 SP2, and Office Web Apps Server 2013 SP1 allow remote attackers to execute arbitrary code via a crafted Office document, aka "Microsoft Office Memory Corruption Vulnerability." Affected products include: Microsoft Excel For Mac, Microsoft Office, Microsoft Office Compatibility Pack, Microsoft Office Web Apps, Microsoft Sharepoint Server.

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  • Exploit and PoC references, threat intelligence from 22 sources
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Severity by source

NVD PRIMARY 7.8 HIGH
AV:L/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
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

DescriptionCVE.org

Microsoft Word 2007, Office 2010 SP2, Word 2010 SP2, Word 2013 SP1, Word 2013 RT SP1, Word for Mac 2011, Excel for Mac 2011, Word 2016 for Mac, Office Compatibility Pack SP3, Word Automation Services on SharePoint Server 2010 SP2, Word Automation Services on SharePoint Server 2013 SP1, Office Web Apps 2010 SP2, and Office Web Apps Server 2013 SP1 allow remote attackers to execute arbitrary code via a crafted Office document, aka "Microsoft Office Memory Corruption Vulnerability."

Threat Intelligence Overview

EPSS Score
48.4%
Top 2% exploitable
Data Quality
3 sources
Confidence: Low
NVD CVE.org EPSS

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 No
Public POC No
EPSS 48.4%
Patch available No
Active threat No
Deciding rule
HIGH severity + EPSS > 10%
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
Defer
Exploitation· derived
None
System Exposure· derived
Small
Automatable· derived
No
Human Impact· derived
Medium

Priority Score

87
Low Medium High Critical
KEV: 0
EPSS: +48
CVSS: +39
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Buffer Overflow HIGH

A buffer overflow occurs when a program writes more data to a memory buffer than it was allocated to hold, causing the excess data to spill into adjacent memory regions.

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.

Affected Products (CPE)CVE.org

cpe:2.3:a:microsoft:excel_for_mac:2011:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:office:2010:sp2:*:*:*:*:*:*
cpe:2.3:a:microsoft:office_compatibility_pack:*:sp3:*:*:*:*:*:*
cpe:2.3:a:microsoft:office_web_apps:2010:sp2:*:*:*:*:*:*
cpe:2.3:a:microsoft:office_web_apps:2013:sp1:*:*:*:*:*:*
cpe:2.3:a:microsoft:sharepoint_server:2010:sp2:*:*:*:*:*:*
cpe:2.3:a:microsoft:sharepoint_server:2013:sp1:*:*:*:*:*:*
cpe:2.3:a:microsoft:word:2007:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:word:2010:sp2:*:*:*:*:*:*
cpe:2.3:a:microsoft:word:2013:sp1:*:*:*:*:*:*
cpe:2.3:a:microsoft:word:2013:sp1:*:*:rt:*:*:*
cpe:2.3:a:microsoft:word_for_mac:2011:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:word_for_mac:2016:*:*:*:*:*:*:*

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References

Advisories & patches
REF http://www.securityfocus.com/bid/94020 REF http://www.securitytracker.com/id/1037246 REF https://docs.microsoft.com/en-us/security-updates/securitybulletins/2016/ms16-133 REF https://www.verisign.com/en_US/security-services/security-intelligence/vulnerability-reports/articles/index.xhtml?id=1233

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