CVE-2009-0556
Act now ● On CISA KEV — actively exploited
Actively exploited — on the CISA KEV list.
CVSS base
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EPSS — probability of exploitation (30 days)
67.3%
99.3th percentile
CISA KEV
Listed
Added 2026-01-07 · patch by 2026-01-28
Weakness / dates
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Published — · modified —
Timeline
- 2026-01-07 — Added to CISA KEV (actively exploited)
- 2026-01-28 — CISA patch-by deadline
Description
Microsoft Office PowerPoint contains a code injection vulnerability that allows remote attackers to execute arbitrary code via a PowerPoint file with an OutlineTextRefAtom containing an invalid index value that triggers memory corruption.