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CVE-2026-56157

Improper access control in Microsoft Office SharePoint allows an authorized attacker to perform spoofing over a network.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:b2bd9e58bafa0554d041f3115a8c5019dd2ba6e743eb3a927714912e42541a7b
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 3 assertions

{"platforms":["x64-based Systems"],"product":"Microsoft SharePoint Enterprise Server 2016","vendor":"Microsoft","versions":[{"lessThan":"16.0.5561.1001","status":"affected","version":"16.0.0","versionType":"custom"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:2f1f6dea56f2bdd2713438dbdb5b5800d3aaa1c58319f3f576176937c5085f42 · sha256:d1733d5fd243edef… · /containers/cna/affected/0

{"platforms":["x64-based Systems"],"product":"Microsoft SharePoint Server 2019","vendor":"Microsoft","versions":[{"lessThan":"16.0.10417.20175","status":"affected","version":"16.0.0","versionType":"custom"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:2f1f6dea56f2bdd2713438dbdb5b5800d3aaa1c58319f3f576176937c5085f42 · sha256:d1733d5fd243edef… · /containers/cna/affected/1

{"platforms":["x64-based Systems"],"product":"Microsoft SharePoint Server Subscription Edition","vendor":"Microsoft","versions":[{"lessThan":"16.0.19725.20434","status":"affected","version":"16.0.0","versionType":"custom"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:2f1f6dea56f2bdd2713438dbdb5b5800d3aaa1c58319f3f576176937c5085f42 · sha256:d1733d5fd243edef… · /containers/cna/affected/2

Affected products and versions

3 source assertions
{"platforms":["x64-based Systems"],"product":"Microsoft SharePoint Enterprise Server 2016","vendor":"Microsoft","versions":[{"lessThan":"16.0.5561.1001","status":"affected","version":"16.0.0","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:2f1f6dea56f2bdd2713438dbdb5b5800d3aaa1c58319f3f576176937c5085f42 · sha256:d1733d5fd243edef… · /containers/cna/affected/0
{"platforms":["x64-based Systems"],"product":"Microsoft SharePoint Server 2019","vendor":"Microsoft","versions":[{"lessThan":"16.0.10417.20175","status":"affected","version":"16.0.0","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:2f1f6dea56f2bdd2713438dbdb5b5800d3aaa1c58319f3f576176937c5085f42 · sha256:d1733d5fd243edef… · /containers/cna/affected/1
{"platforms":["x64-based Systems"],"product":"Microsoft SharePoint Server Subscription Edition","vendor":"Microsoft","versions":[{"lessThan":"16.0.19725.20434","status":"affected","version":"16.0.0","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:2f1f6dea56f2bdd2713438dbdb5b5800d3aaa1c58319f3f576176937c5085f42 · sha256:d1733d5fd243edef… · /containers/cna/affected/2

Provider-owned CVSS observations

1 source assertion
{"metric":{"baseScore":5.4,"baseSeverity":"MEDIUM","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:2f1f6dea56f2bdd2713438dbdb5b5800d3aaa1c58319f3f576176937c5085f42 · sha256:d1733d5fd243edef… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-284","description":"CWE-284: Improper Access Control","lang":"en-US","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:2f1f6dea56f2bdd2713438dbdb5b5800d3aaa1c58319f3f576176937c5085f42 · sha256:d1733d5fd243edef… · /containers/cna/problemTypes/0/descriptions/0

Source references

1 source assertion
{"name":"Microsoft SharePoint Server Spoofing Vulnerability","tags":["vendor-advisory","patch"],"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-56157"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:2f1f6dea56f2bdd2713438dbdb5b5800d3aaa1c58319f3f576176937c5085f42 · sha256:d1733d5fd243edef… · /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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