What’s Vulnerable › Vulnerabilities

CVE-2019-1109

• Severity: critical (CVSS 9.1 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 4.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2019-07-29 · updated 2026-06-17
• Weakness: CWE-20

Description

A spoofing vulnerability exists when Microsoft Office Javascript does not check the validity of the web page making a request to Office documents.An attacker who successfully exploited this vulnerability could read or write information in Office documents.The security update addresses the vulnerability by correcting the way that Microsoft Office Javascript verifies trusted web pages., aka 'Microsoft Office Spoofing Vulnerability'.

Affected products

• Microsoft Office: 2013-sp1, 2016, 2019
• Microsoft Office 365: all versions
• Microsoft Office: 2013 Service Pack 1 (32-bit editions), 2013 Service Pack 1 (64-bit editions), 2013 RT Service Pack 1, 2016 (32-bit edition), 2016 (64-bit edition), 2019 for 32-bit editions (+1)
• Microsoft Office 365 ProPlus: 32-bit Systems, 64-bit Systems

References

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1109
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1109

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