CVE-2018-16198: Toshiba Home gateway HEM-GW16A 1.2.9 and earlier, Toshiba Home gateway HEM-GW26A 1.2.9 and earlier may allow a

Q: How do I fix CVE-2018-16198?

hem-gw16a firmware: upgrade to newer than 1.2.9; hem-gw26a firmware: upgrade to newer than 1.2.9. Exact commands for each OS are on this page.

Q: Is CVE-2018-16198 being exploited?

CVE-2018-16198 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-2018-16198 affect?

CVE-2018-16198 affects hem-gw16a firmware, hem-gw26a firmware. Severity is high (CVSS 8.8). Toshiba Home gateway HEM-GW16A 1.2.9 and earlier, Toshiba Home gateway HEM-GW26A 1.2.9 and earlier may allow an attacker on the same network segment to access a non-documented developer screen to perform operations on the affected device.

This month

HIGH 8.8UPGRADEUPGRADE

CVE-2018-16198 is a high-severity flaw (CVSS 8.8) affecting hem-gw16a firmware, hem-gw26a firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Toshiba Home gateway HEM-GW16A 1.2.9 and earlier, Toshiba Home gateway HEM-GW26A 1.2.9 and earlier may allow an attacker on the same network segment to access a non-documented developer screen to perform operations on the affected device.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Adjacent network
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.5% (top 59%)
CISA exploited list	No
Published	2019-01-09
Last modified	2026-06-17

Publisher (CNA): JPCERT/CC · Vendor: toshiba

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

Am I affected?

Timeline

2019-01-09 23:29 UTCPublished CVE record published
2026-06-17 01:43 UTCUpdated Record last modified

toshiba hem-gw16a firmware UPGRADE

Affected: <= 1.2.9

Fixed in: newer than 1.2.9

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.

toshiba hem-gw26a firmware UPGRADE

Affected: <= 1.2.9

Fixed in: newer than 1.2.9

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-2018-16198?

hem-gw16a firmware: upgrade to newer than 1.2.9; hem-gw26a firmware: upgrade to newer than 1.2.9. Exact commands for each OS are on this page.

Is CVE-2018-16198 being exploited?

CVE-2018-16198 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-2018-16198 affect?

CVE-2018-16198 affects hem-gw16a firmware, hem-gw26a firmware. Severity is high (CVSS 8.8). Toshiba Home gateway HEM-GW16A 1.2.9 and earlier, Toshiba Home gateway HEM-GW26A 1.2.9 and earlier may allow an attacker on the same network segment to access a non-documented developer screen to perform operations on the affected device.

How urgent is CVE-2018-16198?

Priority 41/100. High severity

Related CVEs

CVE-2018-16201 HIGH 8.8 UPGRADE UPGRADE Toshiba Home gateway HEM-GW16A 1.2.9 and earlier, Toshiba Home gateway HEM-GW26A 1.2.9 and earlier uses hard-c
CVE-2018-16200 HIGH 8.8 UPGRADE UPGRADE Toshiba Home gateway HEM-GW16A 1.2.9 and earlier, Toshiba Home gateway HEM-GW26A 1.2.9 and earlier allows an a
CVE-2018-16199 MEDIUM 6.1 UPGRADE UPGRADE Cross-site scripting vulnerability in Toshiba Home gateway HEM-GW16A 1.2.9 and earlier, Toshiba Home gateway H
CVE-2018-16197 MEDIUM 6.5 UPGRADE UPGRADE Toshiba Home gateway HEM-GW16A 1.2.9 and earlier, Toshiba Home gateway HEM-GW26A 1.2.9 and earlier allows an a
CVE-2017-2238 HIGH 8.8 UPGRADE UPGRADE Cross-site request forgery (CSRF) vulnerability in Toshiba Home gateway HEM-GW16A firmware HEM-GW16A-FW-V1.2.0

References

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