CVE-2020-27643
CWE-59Published: December 29, 2020· Updated: Jun 17, 2026
Official Description
The %PROGRAMDATA%\1E\Client directory in 1E Client 5.0.0.745 and 4.1.0.267 allows remote authenticated users and local users to create and modify files in protected directories (where they would not normally have access to create or modify files) via the creation of a junction point to a system directory. This leads to partial privilege escalation.
Technical Analysis
CVE-2020-27643 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
A successful exploit results in full integrity compromise (data manipulation), with a CVSS base score of 6.5.
CVSS v3.1 Vector Breakdown
Affected Vendors & Products
Exploit & PoC Resources
Official Patches & Advisories
All References (2)
Quick Facts
Related CVEs (CWE-59)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2020-27643 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts