CVE-2009-0556Microsoft 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 OutlineT…
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It affects microsoft office_powerpoint and 1 other product. Add what you run to find out whether that includes you.
CISA lists it as known exploited since Jan 7, 2026; federal agencies had to remediate by Jan 28, 2026. Treat that date as your deadline.
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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."
- CVSS
- 8.8 HIGH (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-94
- Known exploited
- Added to CISA KEV Jan 7, 2026; federal remediation due Jan 28, 2026Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
- EPSS (exploitation in the next 30 days)
- 67.31% (percentile 99)
- Assigned by
- microsoft
- NVD analysis
- Analyzed
- Record last updated
- Jan 8, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
microsoft office_powerpoint microsoft:office_powerpoint | 2004 | NVD |
microsoft powerpoint microsoft:powerpoint | 2000; 2002; 2003 | NVD |
References
- http://www.zerodayinitiative.com/advisories/ZDI-09-019x-refsource-misc, third-party-advisory
- http://blogs.technet.com/mmpc/archive/2009/04/02/new-0-day-exploits-using-powerpoint-files.aspxx-refsource-confirm, vendor-advisory
- http://www.vupen.com/english/advisories/2009/1290vdb-entry, x-refsource-vupen, broken-link
- http://osvdb.org/53182vdb-entry, x-refsource-osvdb, broken-link
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-017vendor-advisory, x-refsource-ms
- https://exchange.xforce.ibmcloud.com/vulnerabilities/49632vdb-entry, x-refsource-xf, third-party-advisory
- http://www.securityfocus.com/bid/34351vdb-entry, x-refsource-bid, broken-link
- http://www.vupen.com/english/advisories/2009/0915vdb-entry, x-refsource-vupen, vendor-advisory
- http://blogs.technet.com/msrc/archive/2009/04/02/microsoft-security-advisory-969136.aspxx-refsource-confirm, vendor-advisory
- http://blogs.technet.com/srd/archive/2009/04/02/investigating-the-new-powerpoint-issue.aspxx-refsource-confirm, vendor-advisory
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6279vdb-entry, signature, x-refsource-oval, broken-link
- http://secunia.com/advisories/34572third-party-advisory, x-refsource-secunia, vendor-advisory
- http://www.securitytracker.com/id?1021967vdb-entry, x-refsource-sectrack, broken-link
- http://www.us-cert.gov/cas/techalerts/TA09-132A.htmlthird-party-advisory, x-refsource-cert, us-government-resource
- http://www.microsoft.com/technet/security/advisory/969136.mspxx-refsource-confirm, patch, vendor-advisory
- http://www.kb.cert.org/vuls/id/627331third-party-advisory, x-refsource-cert-vn, us-government-resource
- http://www.securityfocus.com/archive/1/503453/100/0/threadedmailing-list, x-refsource-bugtraq, broken-link
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6204vdb-entry, signature, x-refsource-oval, broken-link
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2009-0556us-government-resource
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.