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CVE-2026-45466ImportantRevised 19 Jun

Microsoft Word Information Disclosure Vulnerability

MSRC advisory NVD CVE.org

Assessment

Heap-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to disclose information locally.

Severity
Important
CVSS base score
3.3CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C
Impact
Information Disclosure
EPSS, next 30 days
0.5%Higher than 38.6% of scored CVEs · FIRST model run 29 Sep 2026 · about EPSS
Public exploit code
No Nuclei template lists it
Exploitability
Exploitation Unlikely
Publicly disclosed
No
Customer action
Required: apply the update
Component
Microsoft Office Word
Weakness
CWE-122: Heap-based Buffer Overflow
Issued by
Microsoft
Published
9 Jun 2026 · June 2026
Last revised
19 Jun 2026Microsoft is announcing the availability of the security updates for Microsoft Office for Mac. Customers running affected Mac software should install the update for their product to be protected from this vulnerability. Customers running other Microsoft Office software do not need to take any actio…

Updates that fix it

0 KBs

No KB listed

MSRC lists no downloadable update, which usually means a service-side fix or a release-notes update. Check the MSRC advisory.

Affected products

Microsoft Office
9 affected products
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