CVE-2026-20956
High
Description
Untrusted pointer dereference in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
SeverityHigh
CVSS7.8
Exploit probability39. percentile0.4%
Product
Microsoft Office Long Term Servicing Channel
PublishedJan 13, 2026
First seenJan 13, 2026
Weakness typeCWE-822CWE-822
How to fix
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| microsoft office_long_term_servicing_channel | 2021, 2024 | — |
| microsoft 365_apps | No range specified | — |
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