Microsoft Office Type Confusion Remote Code Execution Vulnerability
CVE-2025-62554 is a Microsoft Office remote code execution vulnerability caused by access of a resource using an incompatible type (type confusion). The available reporting consistently describes the flaw as affecting Microsoft Office processing of malicious external input, including malicious links and crafted email content. Multiple sources state that Outlook's Preview Pane is an attack vector, meaning specially crafted email content may trigger exploitation during rendering without the victim explicitly opening the attachment or document. Microsoft describes the outcome as local code execution in the context of the affected user.
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Impact, mitigation & remediation
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
Impact
What an attacker gets, and what they’ve been doing with it.
Mitigation
If you can’t patch tonight, do this now.
Remediation
Patch, then assume compromise.
Exploits
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Affected products & vendors
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
Recent activity
24 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A vulnerability referenced as allowing remote code execution on affected systems (mentioned in the context of prior exploitation activity).
A critical remote code execution vulnerability in Microsoft Office that can be exploited via the Outlook preview pane, allowing code execution with no user interaction. Exploitation is considered less likely, but the attack vector is significant.
A critical remote code execution vulnerability in Microsoft Office that can be exploited via the Preview Pane, potentially allowing code execution without user interaction.
A Microsoft Office remote code execution vulnerability due to type confusion, potentially triggerable via a malicious link/email and in worst case without user interaction.
The version that knows your environment.
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.