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Office CVE-2015-2431

CRITICAL
Improper Input Validation (CWE-20)
2015-08-15 secure@microsoft.com
9.3
CVSS 2.0 · NVD
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Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A05:2025 - Injection
ASVS 5.0
V2 - Validation and Business Logic Input validation, allowlisting
Impact

CVSS score of 9.3 (CRITICAL). Attack characteristics: network attack vector, M complexity. Public proof-of-concept exploit code is available. EPSS exploitation probability: 64.74%.

Exploit ScenarioDerived

This vulnerability can be exploited remotely over the network. Successful exploitation could compromise the critical-severity affected system.

Emergency Immediate action required. Why: CRITICAL + EPSS > 30%, no patch available.
No patch listed yet 64.7% exploitation probability (EPSS)

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AnalysisAI

Microsoft Office 2007 SP3 and 2010 SP2, Live Meeting 2007 Console, Lync 2010, Lync 2010 Attendee, Lync 2013 SP1, and Lync Basic 2013 SP1 allow remote attackers to execute arbitrary code via a crafted. Rated critical severity (CVSS 9.3), this vulnerability is remotely exploitable. Public exploit code available and EPSS exploitation probability 64.7%.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

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Technical ContextAI · show details

This vulnerability is classified under CWE-20. Microsoft Office 2007 SP3 and 2010 SP2, Live Meeting 2007 Console, Lync 2010, Lync 2010 Attendee, Lync 2013 SP1, and Lync Basic 2013 SP1 allow remote attackers to execute arbitrary code via a crafted Office Graphics Library (OGL) font, aka "Microsoft Office Graphics Component Remote Code Execution Vulnerability." Affected products include: Microsoft Live Meeting, Microsoft Lync, Microsoft Lync Basic, Microsoft Office.

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 9.3 CRITICAL
AV:N/AC:M/Au:N/C:C/I:C/A:C

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
M
Confidentiality
C
Integrity
C
Availability
C

DescriptionCVE.org

Microsoft Office 2007 SP3 and 2010 SP2, Live Meeting 2007 Console, Lync 2010, Lync 2010 Attendee, Lync 2013 SP1, and Lync Basic 2013 SP1 allow remote attackers to execute arbitrary code via a crafted Office Graphics Library (OGL) font, aka "Microsoft Office Graphics Component Remote Code Execution Vulnerability."

Threat Intelligence Overview

Threat Score
5.3/10
Composite threat intelligence
EPSS Score
64.7%
Top 2% exploitable
Exploit
POC
Public exploit code exists
Data Quality
4 sources
Confidence: Medium

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 CRITICAL
CISA KEV No
Public POC Yes
EPSS 64.7%
Patch available No
Active threat Yes
Deciding rule
CRITICAL + EPSS > 30%, no 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
Scheduled
Exploitation· derived
Poc
System Exposure· derived
Open
Automatable· derived
No
Human Impact· derived
Medium

Priority Score

131
Low Medium High Critical
KEV: 0
EPSS: +65
CVSS: +46
PoC: +20
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

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:live_meeting:2007:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:lync:2010:*:*:*:*:*:x64:*
cpe:2.3:a:microsoft:lync:2010:*:*:*:*:*:x86:*
cpe:2.3:a:microsoft:lync:2010:*:*:*:attendee:*:*:*
cpe:2.3:a:microsoft:lync_basic:2013:sp1:*:*:*:*:x64:*
cpe:2.3:a:microsoft:lync_basic:2013:sp1:*:*:*:*:x86:*
cpe:2.3:a:microsoft:office:2010:sp2:*:*:*:*:x64:*
cpe:2.3:a:microsoft:office:2010:sp2:*:*:*:*:x86:*

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