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CVE-2026-21514

Reliance on untrusted inputs in a security decision in Microsoft Office Word allows an unauthorized attacker to bypass a security feature locally.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:98841ab7d4902a293b8d3a77968caf3079065768e65c3d826aebc7386a790012
Known exploited
CISA KEV
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 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:f34a0fe2933a7718fdffa321291779730b4e25ebd7de864557b3e303e3323d26 · sha256:89150146317e4a2c… · /containers/cna/affected/2

{"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:f34a0fe2933a7718fdffa321291779730b4e25ebd7de864557b3e303e3323d26 · sha256:89150146317e4a2c… · /containers/cna/affected/0

{"product":"Microsoft Office LTSC for Mac 2021","vendor":"Microsoft","versions":[{"lessThan":"16.106.26020821","status":"affected","version":"16.0.1","versionType":"custom"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:f34a0fe2933a7718fdffa321291779730b4e25ebd7de864557b3e303e3323d26 · sha256:89150146317e4a2c… · /containers/cna/affected/3

{"product":"Microsoft Office LTSC for Mac 2024","vendor":"Microsoft","versions":[{"lessThan":"16.106.26020821","status":"affected","version":"16.0.0","versionType":"custom"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:f34a0fe2933a7718fdffa321291779730b4e25ebd7de864557b3e303e3323d26 · sha256:89150146317e4a2c… · /containers/cna/affected/4

{"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:f34a0fe2933a7718fdffa321291779730b4e25ebd7de864557b3e303e3323d26 · sha256:89150146317e4a2c… · /containers/cna/affected/1

Affected products and versions

5 source assertions
{"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:f34a0fe2933a7718fdffa321291779730b4e25ebd7de864557b3e303e3323d26 · sha256:89150146317e4a2c… · /containers/cna/affected/2
{"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:f34a0fe2933a7718fdffa321291779730b4e25ebd7de864557b3e303e3323d26 · sha256:89150146317e4a2c… · /containers/cna/affected/0
{"product":"Microsoft Office LTSC for Mac 2021","vendor":"Microsoft","versions":[{"lessThan":"16.106.26020821","status":"affected","version":"16.0.1","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:f34a0fe2933a7718fdffa321291779730b4e25ebd7de864557b3e303e3323d26 · sha256:89150146317e4a2c… · /containers/cna/affected/3
{"product":"Microsoft Office LTSC for Mac 2024","vendor":"Microsoft","versions":[{"lessThan":"16.106.26020821","status":"affected","version":"16.0.0","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:f34a0fe2933a7718fdffa321291779730b4e25ebd7de864557b3e303e3323d26 · sha256:89150146317e4a2c… · /containers/cna/affected/4
{"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:f34a0fe2933a7718fdffa321291779730b4e25ebd7de864557b3e303e3323d26 · sha256:89150146317e4a2c… · /containers/cna/affected/1

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:F/RL:O/RC:C","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:f34a0fe2933a7718fdffa321291779730b4e25ebd7de864557b3e303e3323d26 · sha256:89150146317e4a2c… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-807","description":"CWE-807: Reliance on Untrusted Inputs in a Security Decision","lang":"en-US","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:f34a0fe2933a7718fdffa321291779730b4e25ebd7de864557b3e303e3323d26 · sha256:89150146317e4a2c… · /containers/cna/problemTypes/0/descriptions/0

Known exploitation assertions

2 source assertions
{"cwes":["CWE-807"],"dateAdded":"2026-02-10","dueDate":"2026-03-03","knownRansomwareCampaignUse":"Unknown","notes":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21514 ; https://nvd.nist.gov/vuln/detail/CVE-2026-21514","product":"Office","requiredAction":"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.","shortDescription":"Microsoft Office Word contains a reliance on untrusted inputs in a security decision vulnerability that could allow an authorized attacker t…
  • cisa_kev_jsonknown_exploited
    urn:baitaphish:normalized-source-record:v2:3fcca6542fbc1c25946de21138274c8526356490968114c56ee13837d22da835 · sha256:16acee8334e59e44… · /vulnerabilities/149
    Open source location →
{"cwes":["CWE-807"],"dateAdded":"2026-02-10","dueDate":"2026-03-03","knownRansomwareCampaignUse":"Unknown","notes":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21514 ; https://nvd.nist.gov/vuln/detail/CVE-2026-21514","product":"Office","requiredAction":"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.","shortDescription":"Microsoft Office Word contains a reliance on untrusted inputs in a security decision vulnerability that could allow an authorized attacker t…
  • cisa_kev_jsonknown_exploited
    urn:baitaphish:normalized-source-record:v2:9623633e8ed5ac73fa587e26bc2dacafd690c1a9341f3493882b79b654744bb8 · sha256:635dff916c4092c0… · /vulnerabilities/152
    Open source location →

Source references

2 source assertions
{"name":"Microsoft Word Security Feature Bypass Vulnerability","tags":["vendor-advisory","patch"],"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21514"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:f34a0fe2933a7718fdffa321291779730b4e25ebd7de864557b3e303e3323d26 · sha256:89150146317e4a2c… · /containers/cna/references/0
{"tags":["government-resource"],"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-21514"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:f34a0fe2933a7718fdffa321291779730b4e25ebd7de864557b3e303e3323d26 · sha256:89150146317e4a2c… · /containers/adp/0/references/0

Attribution and limitations

  • CISA Known Exploited Vulnerabilities JSON: CISA named for provenance; do not use CISA/DHS marks or imply endorsement Source →
  • 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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