CVE-2017-20235: ProSoft Technology ICX35-HWC version 1.3 and prior cellular gateways contain an authentication bypass vulnerab

Q: How do I fix CVE-2017-20235?

icx35-hwc firmware: upgrade to 1.3. Exact commands for each OS are on this page.

Q: Is CVE-2017-20235 being exploited?

CVE-2017-20235 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2017-20235 affect?

CVE-2017-20235 affects icx35-hwc firmware. Severity is critical (CVSS 9.1). 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 cre

Q: How urgent is CVE-2017-20235?

Priority 47/100. Critical severity; Remotely exploitable, no login, no user action

This month

CRITICAL 9.1REMOTEUPGRADE

CVE-2017-20235 is a critical-severity flaw (CVSS 9.1) affecting icx35-hwc firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

Critical severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.1 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.5% (top 61%)
CISA exploited list	No
Weakness	CWE-287
Published	2026-04-03
Last modified	2026-07-21

Publisher (CNA): VulnCheck · Vendor: prosoft-technology

Last updated 2026-07-21 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-03 23:17 UTCPublished CVE record published
2026-07-21 07:10 UTCUpdated Record last modified

prosoft-technology icx35-hwc firmware UPGRADE

Affected: < 1.3

Fixed in: 1.3

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2017-20235?

icx35-hwc firmware: upgrade to 1.3. Exact commands for each OS are on this page.

Is CVE-2017-20235 being exploited?

CVE-2017-20235 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2017-20235 affect?

CVE-2017-20235 affects icx35-hwc firmware. Severity is critical (CVSS 9.1). 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 cre

How urgent is CVE-2017-20235?

Priority 47/100. Critical severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2017-20236 CRITICAL 9.8 UPGRADE ProSoft Technology ICX35-HWC versions 1.3 and prior cellular gateways contain an input validation vulnerabilit

References

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