CVE-2026-55138
Microsoft Excel Information Disclosure vulnerability
MSRC advisory July 14, 2026
Alert details
- Source feed
- Microsoft MSRC
- CVE ID
- CVE-2026-55138
- Affected products
- Microsoft Excel Information Disclosure · Microsoft Microsoft Excel Information Disclosure · Microsoft
What happened
Untrusted pointer dereference in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.
What it means for your business
Microsoft Excel Information Disclosure vulnerability (CVE-2026-55138) was added to Microsoft’s security update guidance. Untrusted pointer dereference in Microsoft Office Excel allows an unauthorized attacker to disclose information locally. If you need help checking exposure, call (864) 335-9223.
Sources
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