CVE-2020-16209: A malicious attacker could exploit the interface of the Fieldcomm Group HART-IP (release 1.0.0.0) by construct

This month

CRITICAL 9.8REMOTEDOWNGRADEMITIGATE

CVE-2020-16209 is a critical-severity flaw (CVSS 9.8) affecting hipserver, hart-ip developer kit firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A malicious attacker could exploit the interface of the Fieldcomm Group HART-IP (release 1.0.0.0) by constructing messages with sufficiently large payloads to overflow the internal buffer and crash the device, or obtain control of the device.

Why this priority

Critical severity
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.5% (top 25%)
CISA exploited list	No
Weakness	CWE-121
Published	2022-05-19
Last modified	2026-06-17

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

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

Am I affected?

Timeline

2022-05-19 18:15 UTCPublished CVE record published
2026-06-17 02:57 UTCUpdated Record last modified

fieldcommgroup hipserver DOWNGRADE

Affected: 3.6.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.6.1

1. Check installed version

apt-cache policy hipserver || rpm -q hipserver || hipserver --version

2. No fixed release: DOWNGRADE to a release before 3.6.1 (Debian / Ubuntu)

apt-cache madison hipserver sudo apt install hipserver=<VERSION_BEFORE_3.6.1> sudo apt-mark hold hipserver

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list hipserver sudo dnf downgrade hipserver-<VERSION_BEFORE_3.6.1> sudo dnf versionlock add hipserver

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

fieldcommgroup hart-ip developer kit firmware MITIGATE

Affected: 1.0.0.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0.0.0

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-2020-16209?

hipserver: downgrade or apply the listed mitigation; hart-ip developer kit firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2020-16209 being exploited?

CVE-2020-16209 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-2020-16209 affect?

CVE-2020-16209 affects hipserver, hart-ip developer kit firmware. Severity is critical (CVSS 9.8). A malicious attacker could exploit the interface of the Fieldcomm Group HART-IP (release 1.0.0.0) by constructing messages with sufficiently large payloads to overflow the internal buffer and crash the device, or obtain control of the devic

How urgent is CVE-2020-16209?

Priority 58/100. Critical severity; Remotely exploitable, no login, no user action

References

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