Read the docs
TI-2021-15492 Aliases CVE-2021-37617

Untrusted Search Path in Nextcloud Desktop Client

Priority LOW 32CWE-426Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
Required
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-426.

Summary

The Nextcloud Desktop Client is a tool to synchronize files from Nextcloud Server with a computer. The Nextcloud Desktop Client invokes its uninstaller script when being installed to make sure there are no remnants of previous installations. In versions 3.0.3 through 3.2.4, the Client searches the `Uninstall.exe` file in a folder that can be written by regular users. This could lead to a case where a malicious user creates a malicious `Uninstall.exe`, which would be executed with administrative privileges on the Nextcloud Desktop Client installation. This issue is fixed in Nextcloud Desktop Client version 3.3.0. As a workaround, do not allow untrusted users to create content in the `C:\` system folder and verify that there is no malicious `C:\Uninstall.exe` file on the system.

Why it matters now

EPSS 0.00456 39th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
nextcloudsecurity-advisories3.0.3 – 3.2.4—No fix listedCNA
  • security-advisories Vendornextcloud Affected 3.0.3 – 3.2.4 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:nextcloud:desktop:*:*:*:*:*:*:*:*3.0.3 to before 3.3.0Vulnerablenextcloud
  • cpe:2.3:a:nextcloud:desktop:*:*:*:*:*:*:*:* Versions 3.0.3 to before 3.3.0 Vulnerable ·nextcloud

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-37617

References

Patch 1

Advisory 2

  • TI-2022-18709 Cross-site scripting (XSS) in Nextcloud Desktop Client CVSS 3.1MEDIUM 6.1
  • TI-2022-18708 Cross-site scripting (XSS) in Nextcloud Desktop Client CVSS 3.1MEDIUM 5.4
  • TI-2022-18707 Cross-site Scripting (XSS) in Nexcloud Desktop Client CVSS 3.1MEDIUM 5.4
  • TI-2022-18710 nextcloudcmd incorrectly trusts bad TLS certificates CVSS 3.1MEDIUM 4.7
  • TI-2020-06645 Path traversal in Desktop Client CVSS 3.1MEDIUM 6.8
  • TI-2021-05740 Injection in Nextcloud Desktop Client CVSS 3.1HIGH 8.8
See all 26 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences