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CVE-2026-56156

Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:b54502db3bb51692d74d7ddc4c6d9567f7e3f300b874e72593839a06e5f10e8c
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 6 assertions

{"product":"Microsoft Office LTSC for Mac 2021","vendor":"Microsoft","versions":[{"lessThan":"16.111.26071215","status":"affected","version":"16.0.1","versionType":"custom"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:c756bd1765651477f4fe8eb050b2637c6259fabb95839273f6be2d18b3822076 · sha256:143514c07f9c147c… · /containers/cna/affected/4

{"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:c756bd1765651477f4fe8eb050b2637c6259fabb95839273f6be2d18b3822076 · sha256:143514c07f9c147c… · /containers/cna/affected/0

{"product":"Microsoft Office 365 for Mac","vendor":"Microsoft","versions":[{"lessThan":"16.111.26071215","status":"affected","version":"1.0.0","versionType":"custom"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:c756bd1765651477f4fe8eb050b2637c6259fabb95839273f6be2d18b3822076 · sha256:143514c07f9c147c… · /containers/cna/affected/1

{"product":"Microsoft Office LTSC for Mac 2024","vendor":"Microsoft","versions":[{"lessThan":"16.111.26071215","status":"affected","version":"16.0.0","versionType":"custom"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:c756bd1765651477f4fe8eb050b2637c6259fabb95839273f6be2d18b3822076 · sha256:143514c07f9c147c… · /containers/cna/affected/5

{"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:c756bd1765651477f4fe8eb050b2637c6259fabb95839273f6be2d18b3822076 · sha256:143514c07f9c147c… · /containers/cna/affected/2

{"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:c756bd1765651477f4fe8eb050b2637c6259fabb95839273f6be2d18b3822076 · sha256:143514c07f9c147c… · /containers/cna/affected/3

Affected products and versions

6 source assertions
{"product":"Microsoft Office LTSC for Mac 2021","vendor":"Microsoft","versions":[{"lessThan":"16.111.26071215","status":"affected","version":"16.0.1","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:c756bd1765651477f4fe8eb050b2637c6259fabb95839273f6be2d18b3822076 · sha256:143514c07f9c147c… · /containers/cna/affected/4
{"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:c756bd1765651477f4fe8eb050b2637c6259fabb95839273f6be2d18b3822076 · sha256:143514c07f9c147c… · /containers/cna/affected/0
{"product":"Microsoft Office 365 for Mac","vendor":"Microsoft","versions":[{"lessThan":"16.111.26071215","status":"affected","version":"1.0.0","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:c756bd1765651477f4fe8eb050b2637c6259fabb95839273f6be2d18b3822076 · sha256:143514c07f9c147c… · /containers/cna/affected/1
{"product":"Microsoft Office LTSC for Mac 2024","vendor":"Microsoft","versions":[{"lessThan":"16.111.26071215","status":"affected","version":"16.0.0","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:c756bd1765651477f4fe8eb050b2637c6259fabb95839273f6be2d18b3822076 · sha256:143514c07f9c147c… · /containers/cna/affected/5
{"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:c756bd1765651477f4fe8eb050b2637c6259fabb95839273f6be2d18b3822076 · sha256:143514c07f9c147c… · /containers/cna/affected/2
{"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:c756bd1765651477f4fe8eb050b2637c6259fabb95839273f6be2d18b3822076 · sha256:143514c07f9c147c… · /containers/cna/affected/3

Provider-owned CVSS observations

1 source assertion
{"metric":{"baseScore":7.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:c756bd1765651477f4fe8eb050b2637c6259fabb95839273f6be2d18b3822076 · sha256:143514c07f9c147c… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-122","description":"CWE-122: Heap-based Buffer Overflow","lang":"en-US","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:c756bd1765651477f4fe8eb050b2637c6259fabb95839273f6be2d18b3822076 · sha256:143514c07f9c147c… · /containers/cna/problemTypes/0/descriptions/0

Source references

1 source assertion
{"name":"Microsoft Excel Remote Code Execution Vulnerability","tags":["vendor-advisory","patch"],"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-56156"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:c756bd1765651477f4fe8eb050b2637c6259fabb95839273f6be2d18b3822076 · sha256:143514c07f9c147c… · /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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