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CVE-2026-40421

Files or directories accessible to external parties in Microsoft Office Word allows an unauthorized attacker to disclose information locally.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:f86f3ad9be2b7637d164b513da0149effd38281d49ce196250394a1e94d67614
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 5 assertions

{"platforms":["32-bit Systems","x64-based Systems"],"product":"Microsoft Office LTSC 2021","vendor":"Microsoft","versions":[{"lessThan":"https://aka.ms/OfficeSecurityReleases","status":"affected","version":"16.0.1","versionType":"custom"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:f7988fe7e088a8f85250a99e8ce4ce3c2e00fedaa3ac545b6d95b42bb2b8d410 · sha256:c2de22887532dcef… · /containers/cna/affected/2

{"platforms":["32-bit Systems","x64-based Systems"],"product":"Microsoft Office 2019","vendor":"Microsoft","versions":[{"lessThan":"https://aka.ms/OfficeSecurityReleases","status":"affected","version":"19.0.0","versionType":"custom"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:f7988fe7e088a8f85250a99e8ce4ce3c2e00fedaa3ac545b6d95b42bb2b8d410 · sha256:c2de22887532dcef… · /containers/cna/affected/1

{"platforms":["32-bit Systems","x64-based Systems"],"product":"Microsoft 365 Apps for Enterprise","vendor":"Microsoft","versions":[{"lessThan":"https://aka.ms/OfficeSecurityReleases","status":"affected","version":"16.0.1","versionType":"custom"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:f7988fe7e088a8f85250a99e8ce4ce3c2e00fedaa3ac545b6d95b42bb2b8d410 · sha256:c2de22887532dcef… · /containers/cna/affected/0

{"platforms":["32-bit Systems","x64-based Systems"],"product":"Microsoft Word 2016","vendor":"Microsoft","versions":[{"lessThan":"16.0.5552.1000","status":"affected","version":"16.0.1","versionType":"custom"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:f7988fe7e088a8f85250a99e8ce4ce3c2e00fedaa3ac545b6d95b42bb2b8d410 · sha256:c2de22887532dcef… · /containers/cna/affected/4

{"platforms":["32-bit Systems","x64-based Systems"],"product":"Microsoft Office LTSC 2024","vendor":"Microsoft","versions":[{"lessThan":"https://aka.ms/OfficeSecurityReleases","status":"affected","version":"16.0.0","versionType":"custom"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:f7988fe7e088a8f85250a99e8ce4ce3c2e00fedaa3ac545b6d95b42bb2b8d410 · sha256:c2de22887532dcef… · /containers/cna/affected/3

Affected products and versions

5 source assertions
{"platforms":["32-bit Systems","x64-based Systems"],"product":"Microsoft Office LTSC 2021","vendor":"Microsoft","versions":[{"lessThan":"https://aka.ms/OfficeSecurityReleases","status":"affected","version":"16.0.1","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:f7988fe7e088a8f85250a99e8ce4ce3c2e00fedaa3ac545b6d95b42bb2b8d410 · sha256:c2de22887532dcef… · /containers/cna/affected/2
{"platforms":["32-bit Systems","x64-based Systems"],"product":"Microsoft Office 2019","vendor":"Microsoft","versions":[{"lessThan":"https://aka.ms/OfficeSecurityReleases","status":"affected","version":"19.0.0","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:f7988fe7e088a8f85250a99e8ce4ce3c2e00fedaa3ac545b6d95b42bb2b8d410 · sha256:c2de22887532dcef… · /containers/cna/affected/1
{"platforms":["32-bit Systems","x64-based Systems"],"product":"Microsoft 365 Apps for Enterprise","vendor":"Microsoft","versions":[{"lessThan":"https://aka.ms/OfficeSecurityReleases","status":"affected","version":"16.0.1","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:f7988fe7e088a8f85250a99e8ce4ce3c2e00fedaa3ac545b6d95b42bb2b8d410 · sha256:c2de22887532dcef… · /containers/cna/affected/0
{"platforms":["32-bit Systems","x64-based Systems"],"product":"Microsoft Word 2016","vendor":"Microsoft","versions":[{"lessThan":"16.0.5552.1000","status":"affected","version":"16.0.1","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:f7988fe7e088a8f85250a99e8ce4ce3c2e00fedaa3ac545b6d95b42bb2b8d410 · sha256:c2de22887532dcef… · /containers/cna/affected/4
{"platforms":["32-bit Systems","x64-based Systems"],"product":"Microsoft Office LTSC 2024","vendor":"Microsoft","versions":[{"lessThan":"https://aka.ms/OfficeSecurityReleases","status":"affected","version":"16.0.0","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:f7988fe7e088a8f85250a99e8ce4ce3c2e00fedaa3ac545b6d95b42bb2b8d410 · sha256:c2de22887532dcef… · /containers/cna/affected/3

Provider-owned CVSS observations

1 source assertion
{"metric":{"baseScore":4.3,"baseSeverity":"MEDIUM","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:f7988fe7e088a8f85250a99e8ce4ce3c2e00fedaa3ac545b6d95b42bb2b8d410 · sha256:c2de22887532dcef… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-73","description":"CWE-73: External Control of File Name or Path","lang":"en-US","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:f7988fe7e088a8f85250a99e8ce4ce3c2e00fedaa3ac545b6d95b42bb2b8d410 · sha256:c2de22887532dcef… · /containers/cna/problemTypes/0/descriptions/0

Source references

1 source assertion
{"name":"Microsoft Word Information Disclosure Vulnerability","tags":["vendor-advisory","patch"],"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40421"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:f7988fe7e088a8f85250a99e8ce4ce3c2e00fedaa3ac545b6d95b42bb2b8d410 · sha256:c2de22887532dcef… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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