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Medium 4.3Published May 12, 2026
CVE-2026-40421Files or directories accessible to external parties in Microsoft Office Word allows an unauthorized attacker to disclose information locally.
Updated under an hour ago ()
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It affects microsoft 365_apps and 3 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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Files or directories accessible to external parties in Microsoft Office Word allows an unauthorized attacker to disclose information locally.
- CVSS
- 4.3 MEDIUM (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
- Weakness (CWE)
- CWE-73
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Modified
- Record last updated
- Jun 17, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
microsoft 365_apps microsoft:365_apps | all versions; all versions | NVD |
microsoft office microsoft:office | 2019; 2019; 2024; 2024 | NVD |
microsoft office_long_term_servicing_channel microsoft:office_long_term_servicing_channel | 2021; 2021 | NVD |
microsoft word microsoft:word | 2016; 2016 | NVD |
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40421vendor-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.