CVE-2026-40421
Microsoft Word Information Disclosure vulnerability
MSRC advisory May 12, 2026
Alert details
- Source feed
- Microsoft MSRC
- CVE ID
- CVE-2026-40421
- Affected products
- Microsoft Word Information Disclosure · Microsoft Microsoft Word Information Disclosure · Microsoft
What happened
External control of file name or path in Microsoft Office Word allows an unauthorized attacker to disclose information over a network.
What it means for your business
Microsoft Word Information Disclosure vulnerability (CVE-2026-40421) was added to Microsoft’s security update guidance. External control of file name or path in Microsoft Office Word allows an unauthorized attacker to disclose information over a network. PremierePC tracks MSRC advisories for Upstate SC businesses — patch or open a ticket if you need help verifying exposure.
EPSS probability
0.62%
Sources
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