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prionPRIOn knowledge basePRION:CVE-2021-26887
HistoryMar 11, 2021 - 4:15 p.m.

Privilege escalation

2021-03-1116:15:00
PRIOn knowledge base
www.prio-n.com
2

8.4 High

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

32.0%

<p>An elevation of privilege vulnerability exists in Microsoft Windows when Folder redirection has been enabled via Group Policy. When folder redirection file server is co-located with Terminal server, an attacker who successfully exploited the vulnerability would be able to begin redirecting another user’s personal data to a created folder.</p>
<p>To exploit the vulnerability, an attacker can create a new folder under the Folder Redirection root path and create a junction on a newly created User folder. When the new user logs in, Folder Redirection would start redirecting to the folder and copying personal data.</p>
<p>This elevation of privilege vulnerability can only be addressed by reconfiguring Folder Redirection with Offline files and restricting permissions, and NOT via a security update for affected Windows Servers. See the <strong>FAQ</strong> section of this CVE for configuration guidance.</p>

8.4 High

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

32.0%

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