CVE-2026-40421
published 2026-05-12CVE-2026-40421: Files or directories accessible to external parties in Microsoft Office Word allows an unauthorized attacker to disclose information locally.
PriorityP424medium4.3CVSS 3.1
AVNACLPRNUIRSUCLINAN
EPSS
0.62%
46.1th percentile
Files or directories accessible to external parties in Microsoft Office Word allows an unauthorized attacker to disclose information locally.
Affected
9 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| microsoft | microsoft_365_apps_for_enterprise | >= 16.0.1 < https://aka.ms/OfficeSecurityReleases | https://aka.ms/OfficeSecurityReleases |
| microsoft | microsoft_office_2019 | >= 19.0.0 < https://aka.ms/OfficeSecurityReleases | https://aka.ms/OfficeSecurityReleases |
| microsoft | microsoft_office_ltsc_2021 | >= 16.0.1 < https://aka.ms/OfficeSecurityReleases | https://aka.ms/OfficeSecurityReleases |
| microsoft | microsoft_office_ltsc_2024 | >= 16.0.0 < https://aka.ms/OfficeSecurityReleases | https://aka.ms/OfficeSecurityReleases |
| microsoft | microsoft_word_2016 | >= 16.0.1 < 16.0.5552.1000 | 16.0.5552.1000 |
| microsoft | office | — | — |
| microsoft | office | — | — |
| microsoft | office_long_term_servicing_channel | — | — |
| microsoft | word | — | — |
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VulDB
Microsoft Office up to Word 2016 file inclusion
vuldb·2026-05-12
CVE-2026-40421 [LOW] Microsoft Office up to Word 2016 file inclusion
A vulnerability was found in Microsoft Office 2019/365 Apps/LTSC 2021/LTSC 2024/Word 2016. It has been classified as problematic. This impacts an unknown function. Performing a manipulation results in file inclusion.
This vulnerability is reported as CVE-2026-40421. The attack is possible to be carried out remotely. No exploit exists.
It is recommended to apply a patch to fix this issue.
GHSA
GHSA-m493-43x7-h3mj: External control of file name or path in Microsoft Office Word allows an unauthorized attacker to disclose information over a network
ghsa_unreviewed·2026-05-12
CVE-2026-40421 [MEDIUM] CWE-73 GHSA-m493-43x7-h3mj: External control of file name or path in Microsoft Office Word allows an unauthorized attacker to disclose information over a network
External control of file name or path in Microsoft Office Word allows an unauthorized attacker to disclose information over a network.
No detection rules found.
No public exploits indexed.
2026-05-12
Published