PowerPoint malformed ClientTextbox — CVE-2009-0556

CVE_2009_0556

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critical CVE likely CVE_2009_0556

What it means

PowerPoint Document contains a malformed EscherClientTextbox with TextHeaderAtom, repeated-byte TextBytesAtom payload, and OutlineTextRefAtom.

Why it fires

CVE-2009-0556 is a Microsoft PowerPoint code execution vulnerability involving malformed textbox/outline text record handling. The detector recovers the exploit shape directly from the PowerPoint Document stream: an EscherClientTextbox containing TextHeaderAtom, a long repeated-byte TextBytesAtom buffer, and OutlineTextRefAtom in the same textbox. Direct recovery is used because weaponized PPT streams often desynchronize full record walking while PowerPoint still reaches the malformed textbox records.

Other CVE heuristics

CVE_2026_34621_RELATED CVE_2023_26369 CVE_2026_34621 CVE_2010_1297_FLASH_RICHMEDIA CVE_2010_1297_SWF_TRIGGER CVE_2011_0611_SWF_TRIGGER CVE_2009_1862_FLASH_RICHMEDIA CVE_2010_2883 CVE_2018_4901 CVE_2009_3459 CVE_2018_4990_JPX_EMBEDDED_CMD CVE_2018_4990_JPX_CMAP_TRIGGER CVE_2010_1240 CVE_2010_0188 CVE_2014_0514 CVE_2013_3346 CVE_2013_0640 CVE_2010_3654_FLASH_RICHMEDIA CVE_2007_5020_MAILTO_MSHTA CVE_2014_0496 CVE_2008_2551 CVE_2021_40444 CVE_2006_4694 CVE_2008_0118