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CVE-2026-55132 is a double-free vulnerability in Microsoft Office Word. The flaw can be triggered when Word processes a specially crafted document, including through the Preview Pane, leading to memory corruption. An unauthorized attacker can exploit the issue by inducing a user to open or preview a malicious Office file, after which arbitrary code execution becomes possible on the local system.
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What an attacker gets, and what they’ve been doing with it.
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No public exploit code observed for this vulnerability.
1 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.