CVE-2020-25195: The length of the input fields of Host Engineering H0-ECOM100, H2-ECOM100, and H4-ECOM100 modules are verified

Q: How do I fix CVE-2020-25195?

h0-ecom100 firmware: upgrade to newer than 5.0.149; h2-ecom100 firmware: upgrade to newer than 5.0.1043; h4-ecom100 firmware: upgrade to newer than 4.0.2148. Exact commands for each OS are on this page.

Q: Is CVE-2020-25195 being exploited?

CVE-2020-25195 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-2020-25195 affect?

CVE-2020-25195 affects h0-ecom100 firmware, h2-ecom100 firmware, h4-ecom100 firmware. Severity is high (CVSS 7.5). The length of the input fields of Host Engineering H0-ECOM100, H2-ECOM100, and H4-ECOM100 modules are verified only on the client side when receiving input from the configuration web server, which may allow an attacker to bypass the check a

Q: How urgent is CVE-2020-25195?

Priority 50/100. High severity; Remotely exploitable, no login, no user action

This month

HIGH 7.5REMOTEUPGRADEUPGRADEUPGRADE

CVE-2020-25195 is a high-severity flaw (CVSS 7.5) affecting h0-ecom100 firmware, h2-ecom100 firmware, h4-ecom100 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The length of the input fields of Host Engineering H0-ECOM100, H2-ECOM100, and H4-ECOM100 modules are verified only on the client side when receiving input from the configuration web server, which may allow an attacker to bypass the check and send input to crash the device.

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.5% (top 26%)
CISA exploited list	No
Weakness	CWE-20
Published	2020-12-15
Last modified	2026-06-17

Publisher (CNA): ICS-CERT · Vendor: hosteng

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2020-12-15 20:15 UTCPublished CVE record published
2026-06-17 03:06 UTCUpdated Record last modified

hosteng h0-ecom100 firmware UPGRADE

Affected: <= 4.0.348 · <= 4.1.113 · <= 5.0.149

Fixed in: newer than 5.0.149

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.

hosteng h2-ecom100 firmware UPGRADE

Affected: <= 4.0.2148 · <= 5.0.1043

Fixed in: newer than 5.0.1043

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.

hosteng h4-ecom100 firmware UPGRADE

Affected: <= 4.0.2148

Fixed in: newer than 4.0.2148

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-2020-25195?

h0-ecom100 firmware: upgrade to newer than 5.0.149; h2-ecom100 firmware: upgrade to newer than 5.0.1043; h4-ecom100 firmware: upgrade to newer than 4.0.2148. Exact commands for each OS are on this page.

Is CVE-2020-25195 being exploited?

CVE-2020-25195 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-2020-25195 affect?

CVE-2020-25195 affects h0-ecom100 firmware, h2-ecom100 firmware, h4-ecom100 firmware. Severity is high (CVSS 7.5). The length of the input fields of Host Engineering H0-ECOM100, H2-ECOM100, and H4-ECOM100 modules are verified only on the client side when receiving input from the configuration web server, which may allow an attacker to bypass the check a

How urgent is CVE-2020-25195?

Priority 50/100. High severity; Remotely exploitable, no login, no user action

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References

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