Microsoft Office
CVE-2019-1109 — Microsoft Office Spoofing Vulnerability
Executive Summary
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.
Overview
9.1
CVSS CRITICAL
Important
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
CVSS Vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
ATTACK VECTOR
Network
ATTACK COMPLEXITY
Low
PRIVILEGES REQUIRED
None
USER INTERACTION
None
SCOPE
Unchanged
EPSS Score
0.0424
probability of exploitation in the next 30 days
0.90153 percentile - updated 2026-08-14
View on FIRST.org
Exploits & PoC
No public exploit or PoC has been linked for this CVE yet. When available, references are sourced from public repositories and may be unverified or non-functional — review carefully before use.
Detection Rules
No public Sigma or Nuclei detection rule has been mapped to this CVE yet. Coverage is concentrated on exploited / high-profile vulnerabilities; check SigmaHQ for updates.
Acknowledgments
None
References
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