Summary
Impact: Security Feature Bypass. Microsoft rating: Important. Not known to be exploited — Exploitation Less Likely. Customer action: Required.
Details
How could an attacker exploit this vulnerability?
Initially an Administrator would need to set a Group Policy in a specific way. Then, an attacker would then need to modify a macro-enabled template that ships with Excel. Then the attacker needs to convince a target to run that malicious file on a system affected by that Policy.
Is the Preview Pane an attack vector for this vulnerability?
No, the Preview Pane is not an attack vector.
Security updates
15.0.5327.1000 — https://support.microsoft.com/kb/4486673
16.0.5134.1000 — https://support.microsoft.com/kb/4493151
14.0.7266.5000 — https://support.microsoft.com/kb/4484376
https — https://docs.microsoft.com/en-us/officeupdates/microsoft365-apps-security-updates
Vulnerabilities 1
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High 7.0
Microsoft Visio Security Feature Bypass Vulnerability
Microsoft Visio Security Feature Bypass Vulnerability
Revision history
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#1
Information published.
References
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CVE-2021-27055 Microsoft Visio Security Feature Bypass Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-27055
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Microsoft Exploitability Index
https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1
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Microsoft Support Lifecycle
https://support.microsoft.com/lifecycle
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Common Vulnerability Scoring System
https://www.first.org/cvss