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CVE-2009-0556 is a memory-corruption vulnerability in Microsoft Office PowerPoint 2000 SP3, 2002 SP3, 2003 SP3, and PowerPoint in Microsoft Office 2004 for Mac. The flaw is triggered when PowerPoint processes a specially crafted PowerPoint file containing an OutlineTextRefAtom structure with an invalid index value. Improper handling of this malformed value causes memory corruption, which can be leveraged by a remote attacker to execute arbitrary code when the victim opens the malicious presentation. Microsoft and multiple summaries in the provided content note that this issue was exploited in the wild, including by Exploit:Win32/Apptom.gen in 2009, and CISA later added it to the KEV catalog due to evidence of active exploitation.
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No public exploit code observed for this vulnerability.
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40 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Legacy Microsoft Office code injection vulnerability added to CISA KEV as actively exploited.
Legacy Microsoft Office PowerPoint vulnerability referenced as still being used by attackers to gain network access (details not expanded in the content).
A code injection vulnerability in Microsoft Office PowerPoint that allows remote code execution via memory corruption when a user opens a malicious file. Patched in 2009, but still exploited on unpatched or unsupported systems.
A critical code injection vulnerability in Microsoft PowerPoint (CVE-2009-0556) that allows remote attackers to execute arbitrary code via specially crafted PowerPoint files, potentially leading to full system compromise.
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Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.