Home/CVE/Untrusted search path in Microsoft Office allows an unauthorized attacker to execute code locally.
CVE

CVE-2026-20943

Untrusted search path in Microsoft Office allows an unauthorized attacker to execute code locally.

Untrusted search path in Microsoft Office allows an unauthorized attacker to execute code locally.

HIGH · CVSS 7 EPSS 0.00094
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules8 YARA rules0
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Weakness Classification

CWE-426Untrusted Search Path
▤

Affected Products & Versions

4
microsoft officeall versions
microsoft office deployment tool< 16.0.19426.20170
microsoft sharepoint server< 16.0.19127.20442
microsoft sharepoint serverall versions
◈

Sigma Hunt Rules

8
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
producthighSuspicious Microsoft Office Child Process - MacOS
producthighCode Executed Via Office Add-in XLL File
producthighPotential Persistence Via Microsoft Office Add-In
producthighPotential Persistence Via Microsoft Office Startup Folder
producthighFile With Uncommon Extension Created By An Office Application
producthighOffice Macro File Creation From Suspicious Process
▣

Scoring & Timeline

7
HIGH · CVSS v3.1 · secure@microsoft.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD13 Jan 2026 · 06:16 PM
CVSS VectorCVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
no
Technical impact
total
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
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Vendor Advisories

1
msrcCVE-2026-20943Remote Code Execution
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External lookups - second-class, for what we don’t hold ourselves
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