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CVE-2026-21509

is CVE-2026-21509real, exploitable, or a false positive? Here's the community ground truth.

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High · CVSS 7.8EPSS 72.2%CISA KEVCWE-807

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Reliance on untrusted inputs in a security decision in Microsoft Office allows an unauthorized attacker to bypass a security feature locally.

References

NVD MITRE CVE.org CISA KEV

Published

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TruePositive verdict for CVE-2026-21509
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Community ground truth

Community verdict

2 verdicts
Not a real issue

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Community real-world severity: High (High 2) — CVSS base score 7.8

In line with its CVSS base score.

Field notes & remediation

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