← All detection heuristics · CVE
critical
CVE likely
CVE_2019_1448
What it means
Excel HTML/XML workbook markup contains unexpected nested content in x:WorksheetOptions.
Why it fires
Cisco Talos describes CVE-2019-1448 as a Microsoft Office Excel HTML/XML parser use-after-free in mso.dll. The reported proof-of-concept uses an Office HTML workbook with ExcelWorkbook/ExcelWorksheets and a malformed x:WorksheetOptions block containing unexpected nested markup.
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