CVE-2026-21509
- Source
- https://cve.org/CVERecord?id=CVE-2026-21509
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-21509.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-21509
- Published
- 2026-01-26T18:16:38.540Z
- Modified
- 2026-03-15T14:53:48.739252Z
- Severity
-
- 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- [none]
- Details
-
Reliance on untrusted inputs in a security decision in Microsoft Office allows an unauthorized attacker to bypass a security feature locally.
- References
-
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-21509
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21509
- https://www.vicarius.io/vsociety/posts/cve-2026-21509-detection-script-microsoft-office-security-feature-bypass-vulnerability
- https://www.vicarius.io/vsociety/posts/cve-2026-21509-mitigation-script-microsoft-office-security-feature-bypass-vulnerability
Affected packages
Git /
Database specific
unresolved_ranges
[
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "2016"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "2016"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "2019"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "2019"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "2021"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "2021"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "2024"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "2024"
}
]
}
]
source
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-21509.json"