What is the CVSS score of CVE-2015-2455?

CVE-2015-2455 has a CVSS 2.0 base score of 9.3 (Critical). CVSS vector: AV:N/AC:M/Au:N/C:C/I:C/A:C. EPSS exploitation probability: 53.2%.

Is there a public PoC exploit available for CVE-2015-2455?

Yes, a public proof-of-concept exploit is available for CVE-2015-2455. Prioritise patching immediately. EPSS: 53.2%.

Is there a patch available for CVE-2015-2455?

Yes, a patch is available for CVE-2015-2455. Update the affected software to the latest version immediately.

Windows Vista CVE-2015-2455

CRITICAL

Improper Input Validation (CWE-20)

2015-08-15 secure@microsoft.com

RCE Microsoft Office Windows Server 2008 Windows Server 2012 Net Framework Windows 10 Windows 7 Windows 8 1 Windows Rt 8 1 Windows Vista Silverlight Windows 8 Windows Rt Live Meeting Lync Lync Basic

9.3

CVSS 2.0 · NVD

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Vulnerability Assessment

Weakness	CWE CWE-20 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: 53.23%.
Exploit ScenarioDerived	This vulnerability can be exploited remotely over the network. Successful exploitation could compromise the critical-severity affected system.

Act Now Prioritize within 24-48h. Why: CRITICAL severity + public POC available.

Patch available 53.2% exploitation probability (EPSS)

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AnalysisAI

Microsoft Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8, Windows 8.1, Windows Server 2012 Gold and R2, Windows RT Gold and 8.1, Windows 10, Office 2007 SP3 and 2010. Rated critical severity (CVSS 9.3), this vulnerability is remotely exploitable. Public exploit code available and EPSS exploitation probability 53.2%.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. 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 Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8, Windows 8.1, Windows Server 2012 Gold and R2, Windows RT Gold and 8.1, Windows 10, Office 2007 SP3 and 2010 SP2, Live Meeting 2007 Console, Lync 2010, Lync 2010 Attendee, Lync 2013 SP1, Lync Basic 2013 SP1, Silverlight before 5.1.40728, and .NET Framework 3.0 SP2, 3.5, 3.5.1, 4, 4.5, 4.5.1, 4.5.2, and 4.6 allow remote attackers to execute arbitrary code via a crafted TrueType font, aka "TrueType Font Parsing Vulnerability," a different vulnerability than CVE-2015-2456. Affected products include: Microsoft .Net Framework, Microsoft Live Meeting, Microsoft Lync, Microsoft Lync Basic, Microsoft Office. Version information: before 5.1.40728.

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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

Confidentiality

Integrity

Availability

DescriptionCVE.org

Microsoft Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8, Windows 8.1, Windows Server 2012 Gold and R2, Windows RT Gold and 8.1, Windows 10, Office 2007 SP3 and 2010 SP2, Live Meeting 2007 Console, Lync 2010, Lync 2010 Attendee, Lync 2013 SP1, Lync Basic 2013 SP1, Silverlight before 5.1.40728, and .NET Framework 3.0 SP2, 3.5, 3.5.1, 4, 4.5, 4.5.1, 4.5.2, and 4.6 allow remote attackers to execute arbitrary code via a crafted TrueType font, aka "TrueType Font Parsing Vulnerability," a different vulnerability than CVE-2015-2456.

Threat Intelligence Overview

Threat Score

5.0/10

Composite threat intelligence

EPSS Score

53.2%

Top 2% exploitable

Exploit

POC

Public exploit code exists

Data Quality

4 sources

Confidence: Medium

NVD

CVE.org

EPSS

Exploit-DB

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 53.2%

Patch available Yes

Active threat Yes

Deciding rule

CRITICAL severity + public POC 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

Human Impact· derived

Medium

Priority Score

119

Low Medium High Critical

KEV: 0

EPSS: +53

CVSS: +46

PoC: +20

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

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:.net_framework:3.0:sp2:*:*:*:*:*:*

cpe:2.3:a:microsoft:.net_framework:4.0:*:*:*:*:*:*:*

cpe:2.3:a:microsoft:.net_framework:4.5:*:*:*:*:*:*:*

cpe:2.3:a:microsoft:.net_framework:4.5.1:*:*:*:*:*:*:*

cpe:2.3:a:microsoft:.net_framework:4.5.2:*:*:*:*:*:*:*

cpe:2.3:a:microsoft:.net_framework:4.6:*:*:*:*:*:*:*

cpe:2.3:a:microsoft:.net_framework:3.5.1:*:*:*:*:*:*:*

cpe:2.3:a:microsoft:.net_framework:3.5:*:*:*:*:*:*:*

cpe:2.3:a:microsoft:live_meeting:2007:*:*:*:*:*:*:*

cpe:2.3:a:microsoft:lync:2010:*:*:*:*:*:*:*

cpe:2.3:a:microsoft:lync:2010:*:*:*:attendee:*:*:*

cpe:2.3:a:microsoft:lync:2013:sp1:*:*:*:*:*:*

cpe:2.3:a:microsoft:lync_basic:2013:sp1:*:*:*:*:*:*

cpe:2.3:a:microsoft:office:2007:sp3:*:*:*:*:*:*

cpe:2.3:a:microsoft:office:2010:sp2:*:*:*:*:*:*

cpe:2.3:a:microsoft:silverlight:*:*:*:*:*:*:*:*

cpe:2.3:o:microsoft:windows_10:-:*:*:*:*:*:*:*

cpe:2.3:o:microsoft:windows_7:-:*:*:*:*:*:*:*

cpe:2.3:o:microsoft:windows_8:-:*:*:*:*:*:*:*

cpe:2.3:o:microsoft:windows_8.1:-:*:*:*:*:*:*:*

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References

Advisories & patches

PATCH https://docs.microsoft.com/en-us/security-updates/securitybulletins/2015/ms15-080 REF http://www.securityfocus.com/bid/76216 REF http://www.securitytracker.com/id/1033238

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