HOMEVULNERABILITIESCVE-2018-8840
CRITICAL

CVE-2018-8840

CWE-121Published: April 18, 2018· Updated: Jun 17, 2026

9.8
CVSS v3.1

Official Description

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.

NVD Source

Technical Analysis

CVE-2018-8840 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

indusoft1 product(s)
web studio
industrial-software1 product(s)
intouch machine edition 2017
Source: NVD CPE · 2 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttp://software.schneider-electric.com/pdf/security-bulletin/lfsec00000125/
ADVISORYhttp://www.securityfocus.com/bid/103949
ADVISORYhttps://ics-cert.us-cert.gov/advisories/ICSA-18-107-01
ADVISORYhttps://www.tenable.com/security/research/tra-2018-07
ADVISORYhttp://software.schneider-electric.com/pdf/security-bulletin/lfsec00000125/
ADVISORYhttp://www.securityfocus.com/bid/103949
ADVISORYhttps://ics-cert.us-cert.gov/advisories/ICSA-18-107-01
ADVISORYhttps://www.tenable.com/security/research/tra-2018-07

All References (8)

→
http://software.schneider-electric.com/pdf/security-bulletin/lfsec00000125/Third Party Advisory
→
http://www.securityfocus.com/bid/103949Third Party Advisory · VDB Entry
→
https://ics-cert.us-cert.gov/advisories/ICSA-18-107-01Third Party Advisory · US Government Resource
→
https://www.tenable.com/security/research/tra-2018-07Third Party Advisory
→
http://software.schneider-electric.com/pdf/security-bulletin/lfsec00000125/Third Party Advisory
→
http://www.securityfocus.com/bid/103949Third Party Advisory · VDB Entry
→
https://ics-cert.us-cert.gov/advisories/ICSA-18-107-01Third Party Advisory · US Government Resource
→
https://www.tenable.com/security/research/tra-2018-07Third Party Advisory

Quick Facts

CVE IDCVE-2018-8840
CVSS Score9.8 / 10
SeverityCRITICAL
WeaknessCWE-121
CISA KEVNo
Affected2 vendor(s)
PublishedApr 18, 2018

Related CVEs (CWE-121)

CVE-2026-12846
10.0
CVE-2026-12485
10.0
CVE-2021-21961
10.0
CVE-2021-21960
10.0
CVE-2017-20230
10.0
CVE-2026-12847
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2018-8840 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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