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Vulnerabilities/CVE-2009-0556
Vulnerability dossier

CVE-2009-0556

VendormicrosoftPublishedApr 3, 2009SourceNVDWeaknessCWE-94
Act now

Actively exploited in the wild. Patch or mitigate immediately — don't wait for a maintenance window.

Severity
High · 8.8
CVSS base score
Exploitation
In the wild
CISA KEV
Predicted risk
67% model
EPSS forecast — overtaken by confirmed exploitation
Exposure
Remote
Exploitable over the network without credentials
01

What's the risk?

An unauthenticated attacker, remotely over the network, if a user is tricked into opening a malicious file or link, can fully compromise the system — steal data, tamper with it and take it offline.

Microsoft Office PowerPoint 2000 SP3, 2002 SP3, and 2003 SP3, and PowerPoint in Microsoft Office 2004 for Mac, allows remote attackers to execute arbitrary code via a PowerPoint file with an OutlineTextRefAtom containing an an invalid index value that triggers memory corruption, as exploited in the wild in April 2009 by Exploit:Win32/Apptom.gen, aka "Memory Corruption Vulnerability."

How it's exploitedMITRE ATT&CK · inferred from weakness & vector
Execution
T1059Command and Scripting InterpreterT1203Exploitation for Client Execution

Inferred from the weakness type (CWE) and how the flaw is reached — the techniques an attacker would chain to exploit this. Real-world corroboration appears here as threat intel is folded in.

02

Who's exploiting it?

Corroborated threat activity referencing this CVE — with source and confidence, not inference.

Confirmed exploited in the wild. CISA KEV · catalogued Jan 7, 2026

Named threat actors and observed ATT&CK techniques appear here as intel feeds are folded in — the ATT&CK chain above stays inferred until then.

03

Are we affected?

4
  • Affectedmicrosoft · office_powerpoint
0.0
/ 10.0 base
High severity
Key facts
CVE ID
CVE-2009-0556
Published
Apr 3, 2009
Last modified
Apr 22, 2026
CVSS
8.8 (v3.1)
EPSS
67.31%
In CISA KEV
Yes
Confidence
100/100
Weakness
CWE-94
Timeline
  1. Apr 3, 2009Published to NVDNVD
  2. Apr 22, 2026Record last modifiedNVD
View on NVD
2004
  • Affectedmicrosoft · powerpoint2000
  • Affectedmicrosoft · powerpoint2002
  • Affectedmicrosoft · powerpoint2003
  • 04

    What to do

    Generated by Wavense from the CVE record — an immediate mitigation and the permanent fix.

    Generating AI analysis…
    Technical details— weakness, CVSS vector & calculator, related CVEs

    Weakness

    1
    CWE-94Common Weakness Enumeration · MITRE definition

    CVSS 3.1 details

    CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
    0.0
    / 10.0 base
    High severity
    CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
    Exploitability metrics
    Attack VectorAV
    Remotely exploitable across a network
    Attack ComplexityAC
    No special conditions required
    Privileges RequiredPR
    No authorization needed
    User InteractionUI
    A user must take an action
    Impact metrics
    ScopeS
    Impact confined to the vulnerable component
    ConfidentialityC
    Total loss of confidentiality
    IntegrityI
    Total loss of integrity
    AvailabilityA
    Total loss of availability

    Related vulnerabilities

    Other CVEs affecting office powerpoint

    NVD
    8.8High
    CVE-2015-2424KEV

    Microsoft PowerPoint 2007 SP3, Word 2007 SP3, PowerPoint 2010 SP2, Word 2010 SP2, PowerPoint 2013 SP1, Word 2013 SP1, and PowerPoint 2013 RT SP1 allow remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted Office document, aka "Microsoft Office Memory Corruption Vulnerability."

    microsoftCWE-787Out-of-bounds WriteNetworkLow effortNo authUser neededCIA
    2015-07-14
    NVD
    8.8High
    CVE-2007-0671KEV

    Unspecified vulnerability in Microsoft Excel 2000, XP, 2003, and 2004 for Mac, and possibly other Office products, allows remote user-assisted attackers to execute arbitrary code via unknown attack vectors, as demonstrated by Exploit-MSExcel.h in targeted zero-day attacks.

    microsoftNetworkLow effortNo authUser neededCIA
    2007-02-03
    NVD
    7.8High
    CVE-2010-2572KEVExploit likely

    Buffer overflow in Microsoft PowerPoint 2002 SP3 and 2003 SP3 allows remote attackers to execute arbitrary code via a crafted PowerPoint 95 document, aka "PowerPoint Parsing Buffer Overflow Vulnerability."

    microsoftCWE-120Buffer OverflowLocalLow effortNo authUser neededCIA
    2010-11-09
    NVD
    9.3Critical
    CVE-2015-0085

    Use-after-free vulnerability in Microsoft Office 2007 SP3, Excel 2007 SP3, PowerPoint 2007 SP3, Word 2007 SP3, Office 2010 SP2, Excel 2010 SP2, PowerPoint 2010 SP2, Word 2010 SP2, Office 2013 Gold and SP1, Word 2013 Gold and SP1, Office 2013 RT Gold and SP1, Word 2013 RT Gold and SP1, Excel Viewer, Office Compatibility Pack SP3, Word Automation Services on SharePoint Server 2010 SP2, Excel Services on SharePoint Server 2013 Gold and SP1, Word Automation Services on SharePoint Server 2013 Gold and SP1, Web Applications 2010 SP2, Office Web Apps Server 2010 SP2, Web Apps Server 2013 Gold and SP1, SharePoint Server 2007 SP3, Windows SharePoint Services 3.0 SP3, SharePoint Foundation 2010 SP2, SharePoint Server 2010 SP2, SharePoint Foundation 2013 Gold and SP1, and SharePoint Server 2013 Gold and SP1 allows remote attackers to execute arbitrary code via a crafted Office document, aka "Microsoft Office Component Use After Free Vulnerability."

    microsoftNetworkMedium effortNo authCIA
    2015-03-11
    NVD
    8.8High
    CVE-2026-69797

    Use after free in Microsoft Office PowerPoint allows an unauthorized attacker to execute code over a network.

    microsoftCWE-416Use After FreeNetworkLow effortNo authUser neededCIA
    2026-09-08
    NVD
    8.8High
    CVE-2026-69767

    Use after free in Microsoft Office PowerPoint allows an unauthorized attacker to execute code over a network.

    microsoftCWE-416Use After FreeNetworkLow effortNo authUser neededCIA
    2026-09-08
    NVD
    8.8High
    CVE-2026-69678

    Use after free in Microsoft Office PowerPoint allows an unauthorized attacker to execute code over a network.

    microsoftCWE-416Use After FreeNetworkLow effortNo authUser neededCIA
    2026-09-08
    NVD
    7.8High
    CVE-2026-55123

    Heap-based buffer overflow in Microsoft Office PowerPoint allows an unauthorized attacker to execute code locally.

    microsoftCWE-122Heap-based Buffer OverflowLocalLow effortNo authUser neededCIA
    2026-07-14