CVE-2018-17904: Reliance 4 SCADA/HMI, Version 4.7.3 Update 3 and prior

Q: How do I fix CVE-2018-17904?

reliance 4: upgrade to newer than 4.7.3. Exact commands for each OS are on this page.

Q: Is CVE-2018-17904 being exploited?

CVE-2018-17904 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-2018-17904 affect?

CVE-2018-17904 affects reliance 4. Severity is medium (CVSS 6.1). Reliance 4 SCADA/HMI, Version 4.7.3 Update 3 and prior. This vulnerability could allow an unauthorized attacker to inject arbitrary code.

Q: How urgent is CVE-2018-17904?

Priority 36/100. No elevated risk signals yet.

Routine

MEDIUM 6.1UPGRADE

CVE-2018-17904 is a medium-severity flaw (CVSS 6.1) affecting reliance 4. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Reliance 4 SCADA/HMI, Version 4.7.3 Update 3 and prior. This vulnerability could allow an unauthorized attacker to inject arbitrary code.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.9% (top 42%)
CISA exploited list	No
Weakness	CWE-79
Published	2018-10-25
Last modified	2026-06-17

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

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

Am I affected?

Timeline

2018-10-25 22:29 UTCPublished CVE record published
2026-06-17 01:46 UTCUpdated Record last modified

geovap reliance 4 UPGRADE

Affected: <= 4.7.3 · 4.7.3 update_1 · 4.7.3 update_2 · 4.7.3 update_3

Fixed in: newer than 4.7.3

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy reliance-4 || rpm -q reliance-4 || reliance-4 --version

2. UPGRADE to newer than 4.7.3 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade reliance-4

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade reliance-4

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

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-2018-17904?

reliance 4: upgrade to newer than 4.7.3. Exact commands for each OS are on this page.

Is CVE-2018-17904 being exploited?

CVE-2018-17904 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-2018-17904 affect?

CVE-2018-17904 affects reliance 4. Severity is medium (CVSS 6.1). Reliance 4 SCADA/HMI, Version 4.7.3 Update 3 and prior. This vulnerability could allow an unauthorized attacker to inject arbitrary code.

How urgent is CVE-2018-17904?

Priority 36/100. No elevated risk signals yet.

References

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