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Home / Threats / CVE-2026-20943

CVE-2026-20943 - Microsoft Office 2016 Plugin

CVE-2026-20943

Vulnerability CVE-2026-20943 PLUGIN microsoft-office-2016 HIGH

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

CVE-2026-20943

HIGH CVSS 7.0 Published 2026-01-13 Updated 2026-01-16
AI Risk Elevated (64/100) Active Exploit: No strong signal Published Exploit: No public exploit references Priority: P3 Priority
Severity Band HIGH
CVSS Vector CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Affected Components 5
Reference Links 1
AI Risk Engine Elevated (64/100)
Exploitability Medium
Active Exploitation No strong signal
Published Exploit Status No public exploit references

Threat Timeline

  1. 2026-01-13 CVE published and first recorded in the threat feed.
  2. 2026-01-16 Record updated with latest vulnerability metadata.
  3. 2026-04-09 AI technical context refreshed for mitigation and impact guidance.
  4. Now Monitoring for follow-up changes, linked references, and new related CVEs.

AI Context

Machine-generated threat intelligence

AI Updated 12 days ago

AI enriched 12 days ago (2026-04-09 08:04 UTC)

Technical Summary

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

Potential Impact

Severity is HIGH (CVSS 7.0). Depending on deployment context, affected components may be exposed to unauthorized actions or data integrity risk.

Exploitability Assessment

Exploitability is assessed as Medium based on severity and technical exposure profile.

Primary risk drivers: severity and technical exposure profile

Mitigation Recommendations

Validate affected product versions, prioritize patching, and monitor references for vendor remediation guidance. If immediate patching is not possible, apply compensating controls and limit exposure of vulnerable surfaces.

Detection & Monitoring

Track authentication anomalies, unexpected file writes, and suspicious plugin API activity around affected components.

Business Impact Lens

Prioritize remediation where affected components process customer data, admin sessions, or Internet-exposed workflows.

Affected Products

Microsoft Office 2016 PLUGIN · microsoft-office-2016 Affected: >= 16.0.0, < 16.0.5535.1000 Fixed in: 16.0.5535.1000
Microsoft Office Deployment Tool PLUGIN · microsoft-office-deployment-tool Affected: >= 1.0, < 16.0.19426.20170 Fixed in: 16.0.19426.20170
Microsoft SharePoint Enterprise Server 2016 PLUGIN · microsoft-sharepoint-enterprise-server-2016 Affected: >= 16.0.0, < 16.0.5535.1001 Fixed in: 16.0.5535.1001
Microsoft SharePoint Server 2019 PLUGIN · microsoft-sharepoint-server-2019 Affected: >= 16.0.0, < 16.0.10417.20083 Fixed in: 16.0.10417.20083
Microsoft SharePoint Server Subscription Edition PLUGIN · microsoft-sharepoint-server-subscription-edition Affected: >= 16.0.0, < 16.0.19127.20442 Fixed in: 16.0.19127.20442

Related Vulnerabilities

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CVE-2026-20953 - Microsoft Office 2016 Plugin CVE-2026-20953 Published 2026-01-13 CVE-2026-20952 - Microsoft Office 2016 Plugin CVE-2026-20952 Published 2026-01-13 CVE-2026-20963 - Microsoft SharePoint Enterprise Server 2016 Plugin CVE-2026-20963 Published 2026-01-13 CVE-2026-20958 - Microsoft SharePoint Enterprise Server 2016 Plugin CVE-2026-20958 Published 2026-01-13 CVE-2026-20959 - Microsoft SharePoint Enterprise Server 2016 Plugin CVE-2026-20959 Published 2026-01-13 CVE-2026-20947 - Microsoft SharePoint Enterprise Server 2016 Plugin CVE-2026-20947 Published 2026-01-13
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