CVE-2018-8840: A remote attacker could send a carefully crafted packet in InduSoft Web Studio v8.1 and prior versions, and/or

Q: How do I fix CVE-2018-8840?

web studio: upgrade to newer than 8.1; intouch machine edition 2017: upgrade to newer than 8.1. Exact commands for each OS are on this page.

Q: Is CVE-2018-8840 being exploited?

CVE-2018-8840 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-2018-8840 affect?

CVE-2018-8840 affects web studio, intouch machine edition 2017. Severity is critical (CVSS 9.8). A remote attacker could send a carefully crafted packet in InduSoft Web Studio v8.1 and prior versions, and/or InTouch Machine Edition 2017 v8.1 and prior versions during a tag, alarm, or event related action such as read and write, which m

Q: How urgent is CVE-2018-8840?

Priority 63/100. Critical severity; EPSS top 5%: very likely to be exploited; Remotely exploitable, no login, no user action

This week

CRITICAL 9.8REMOTEUPGRADEUPGRADE

CVE-2018-8840 is a critical-severity flaw (CVSS 9.8) affecting web studio, intouch machine edition 2017. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A remote attacker could send a carefully crafted packet in InduSoft Web Studio v8.1 and prior versions, and/or InTouch Machine Edition 2017 v8.1 and prior versions during a tag, alarm, or event related action such as read and write, which may allow remote code execution.

Why this priority

Critical severity
EPSS top 5%: very likely to be exploited
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	8.6% (top 5%)
CISA exploited list	No
Weakness	CWE-121, CWE-119
Published	2018-04-18
Last modified	2026-06-17

Publisher (CNA): ICS-CERT · Vendor: indusoft · industrial-software

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

Am I affected?

Timeline

2018-04-18 20:29 UTCPublished CVE record published
2026-06-17 02:05 UTCUpdated Record last modified

indusoft web studio UPGRADE

Affected: <= 8.1

Fixed in: newer than 8.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy web-studio || rpm -q web-studio || web-studio --version

2. UPGRADE to newer than 8.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade web-studio

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade web-studio

Note

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

industrial-software intouch machine edition 2017 UPGRADE

Affected: <= 8.1

Fixed in: newer than 8.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy intouch-machine-edition-2017 || rpm -q intouch-machine-edition-2017 || intouch-machine-edition-2017 --version

2. UPGRADE to newer than 8.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade intouch-machine-edition-2017

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade intouch-machine-edition-2017

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-2018-8840?

web studio: upgrade to newer than 8.1; intouch machine edition 2017: upgrade to newer than 8.1. Exact commands for each OS are on this page.

Is CVE-2018-8840 being exploited?

CVE-2018-8840 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-2018-8840 affect?

CVE-2018-8840 affects web studio, intouch machine edition 2017. Severity is critical (CVSS 9.8). A remote attacker could send a carefully crafted packet in InduSoft Web Studio v8.1 and prior versions, and/or InTouch Machine Edition 2017 v8.1 and prior versions during a tag, alarm, or event related action such as read and write, which m

How urgent is CVE-2018-8840?

Priority 63/100. Critical severity; EPSS top 5%: very likely to be exploited; Remotely exploitable, no login, no user action

References

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