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Full vulnerability report · 2018
CVE-2018-7240High confidence

A vulnerability exists in Schneider Electric's Modicon Quantum in all versions of the communication modules which could allow arbitrary code execution

Schneider Electric SE · Modicon Quantum

8.8HighCVSS 3.0
Recommended action
Within 7 days

High technical severity; prioritise exposed affected systems while verifying vendor guidance.

Fix not verified
Optional official sources

National CERT insights
?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

Select the national-authority views to include. The exact source language is shown on each matched advisory. Your choice is remembered on this device and encoded in the shareable URL.

Official European source

ENISA European Vulnerability Database

Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.

1 current
ENISA EUVD identifier

EUVD-2018-18979

No EUVD known-exploited evidence

ENISA has published the identifier mapping but no EUVD description has been stored yet.

EUVD state
Present in the current official mapping
Known exploitation
Not present in the current ENISA EUVD known-exploited dataset. This is not proof of no exploitation.
ENISA score
Not supplied in the stored EUVD record
Advisory evidence
No linked advisory details stored yet
Recommended actionWithin 7 days

High technical severity; prioritise exposed affected systems while verifying vendor guidance.

Fix not verified
01

What, why and how

A vulnerability exists in Schneider Electric's Modicon Quantum in all versions of the communication modules which could allow arbitrary code execution. An FTP command used to upgrade the firmware of the module can be misused to cause a denial of service, or in extreme cases, to load a malicious firmware.

What

A vulnerability exists in Schneider Electric's Modicon Quantum in all versions of the communication modules which could allow arbitrary code execution. An FTP command used to upgrade the firmware of the module can be misused to cause a denial of service, or in extreme cases, to load a malicious firmware.

Why

A bounds error lets data be written beyond the intended memory region, potentially corrupting control data.

How

An attacker operating through a network path may attempt exploitation with low privileges. If successful, the issue may execute code or commands in the affected security context.

What

A vulnerability exists in Schneider Electric's Modicon Quantum in all versions of the communication modules which could allow arbitrary code execution. An FTP command used to upgrade the firmware of the module can be misused to cause a denial of service, or in extreme cases, to load a malicious firmware.

Why

A bounds error lets data be written beyond the intended memory region, potentially corrupting control data.

How

An attacker operating through a network path may attempt exploitation with low privileges. If successful, the issue may execute code or commands in the affected security context.

02

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

Public PoC / exploit material
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
None recorded

No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.

Likely attack path
a network path → Out-of-bounds Write → execute code or commands in the affected security context
Attack surface
Network
Privileges required
Low: a basic authenticated account is required
User interaction
None
Attack complexity
Low: no specialised conditions are recorded
Security boundary
Unchanged: impact remains within the vulnerable component's security authority
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-787 ↗

CWE-787: Out-of-bounds Write. The product writes data past the end, or before the beginning, of the intended buffer.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Common Vulnerability Scoring System 3.0: the compact vector below is decoded into plain language.

AVNetworkAttack vector: The vulnerable component can be reached over a network.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRLowPrivileges required: The attacker needs basic user-level privileges.UINoneUser interaction: No action by another user is required.SUnchangedScope: The security impact remains within the vulnerable component's authority.CHighConfidentiality impact: A successful attack can cause a major loss.IHighIntegrity impact: A successful attack can cause a major loss.AHighAvailability impact: A successful attack can cause a major loss.
Post-exploitation / living off the land
After compromise, an attacker may use built-in shells, scripting engines, scheduled tasks and native network utilities for discovery, persistence or movement. This is a plausible LoTL path, not evidence that it has occurred for every attack.
NetworkRemote code executionDenial of serviceCWE-787
A

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

CERT-FR · French · CERTFR-2022-AVI-815Multiples vulnérabilités dans les produits Schneider

d_Communication_Modules_V2.0.pdf Bulletin de sécurité Schneider SEVD-2021-313-05 du 13 septembre 2022 https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2021-313-05&p_enDocType=Security+and+Safety+Notice&p_File_Name=SEVD-2021-313-05_Badalloc_Vulnerabilities_Security_Notification_V11.0.pdf Bulletin de sécurité Schneider SEVD-2022-221-02 du 13 septembre 2022 https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2022-221-02&p_enDocType=Security+and+Safety+Notice&p_File_Name=SEVD-2022-221-02_Modicon_Controllers_Security_Notification_V2.0.pdf Référence CVE CVE-2011-4859 https://www.cve.org/CVERecord?id=CVE-2011-4859 Référence CVE CVE-2018-7240 https://www.cve.org/CVERecord?id=CVE-2018-7240 Référence CVE CVE-2018-7241 https://www.cve.org/CVERecord?id=CVE-2018-7241 Référence CVE CVE-2018-7242 https://www.cve.org/CVERecord?id=CVE-2018-7242 Référence CVE CVE-2018-7857 https://www.cve.org/CVERecord?id=CVE-2018-7857 Référence CVE CVE-2019-6807 https://www.cve.org/CVERecord?id=CVE-2019-6807 Référence CVE CVE-2020-28895 https://www.cve.org/CVERecord?id=CVE-2020-28895 Référence CVE CVE-2020-35198 https://www.cve.org/CVERecord?id=CVE-2020-35198 Référence CVE CVE-2020-35683 https://www.cve.org/CVERecord?id=CVE-2020-35683 Référence CVE CVE-2020-35684 https://www.cve.org/CVERecord?id=CVE-2020-

Official advisory ↗
CERT-FR · French · CERTFR-2022-AVI-717Multiples vulnérabilités dans les produits Schneider

_Security_Notification_V1.1.pdf Bulletin de sécurité Schneider SEVD-2022-221-03 du 9 août 2022 https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2022-221-03&p_enDocType=Security+and+Safety+Notice&p_File_Name=SEVD-2022-221-03_EcoStruxure_Control_Expert_Security_Notification.pdf Bulletin de sécurité Schneider SEVD-2022-221-04 du 9 août 2022 https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2022-221-04&p_enDocType=Security+and+Safety+Notice&p_File_Name=SEVD-2022-221-04-Modicon_Controllers_Ethernet_Modules_Security_Notification_V1.1.pdf Référence CVE CVE-2011-4859 https://www.cve.org/CVERecord?id=CVE-2011-4859 Référence CVE CVE-2018-7240 https://www.cve.org/CVERecord?id=CVE-2018-7240 Référence CVE CVE-2018-7241 https://www.cve.org/CVERecord?id=CVE-2018-7241 Référence CVE CVE-2018-7242 https://www.cve.org/CVERecord?id=CVE-2018-7242 Référence CVE CVE-2019-6841 https://www.cve.org/CVERecord?id=CVE-2019-6841 Référence CVE CVE-2019-6842 https://www.cve.org/CVERecord?id=CVE-2019-6842 Référence CVE CVE-2019-6843 https://www.cve.org/CVERecord?id=CVE-2019-6843 Référence CVE CVE-2019-6844 https://www.cve.org/CVERecord?id=CVE-2019-6844 Référence CVE CVE-2019-6846 https://www.cve.org/CVERecord?id=CVE-2019-6846 Référence CVE CVE-2019-6847 https://www.cve.org/CVERecord?id=CVE-2019-6847 Ré

Official advisory ↗
CERT-FR · French · CERTFR-2022-AVI-1093Multiples vulnérabilités dans les produits Schneider

rabilités ont été découvertes dans les produits Schneider. Certaines d'entre elles permettent à un attaquant de provoquer une exécution de code arbitraire à distance, un déni de service à distance et un contournement de la politique de sécurité. Solution Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation). Documentation Bulletin de sécurité Schneider du 13 décembre 2022 https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2022-347-01&p_enDocType=Security+and+Safety+Notice&p_File_Name=SEVD-2022-347-01-APC_Easy_UPS_Online_Monitoring_Software_Security_Notification.pdf Référence CVE CVE-2018-7240 https://www.cve.org/CVERecord?id=CVE-2018-7240 Référence CVE CVE-2018-7241 https://www.cve.org/CVERecord?id=CVE-2018-7241 Référence CVE CVE-2018-7242 https://www.cve.org/CVERecord?id=CVE-2018-7242 Référence CVE CVE-2019-6841 https://www.cve.org/CVERecord?id=CVE-2019-6841 Référence CVE CVE-2019-6842 https://www.cve.org/CVERecord?id=CVE-2019-6842 Référence CVE CVE-2019-6843 https://www.cve.org/CVERecord?id=CVE-2019-6843 Référence CVE CVE-2019-6844 https://www.cve.org/CVERecord?id=CVE-2019-6844 Référence CVE CVE-2019-6846 https://www.cve.org/CVERecord?id=CVE-2019-6846 Référence CVE CVE-2019-6847 https://www.cve.org/CVERecord?id=CVE-2019-6847 Ré

Official advisory ↗
CERT-FR · French · CERTFR-2018-AVI-154Multiples vulnérabilités dans SCADA Schneider Electric Modicon

De multiples vulnérabilités ont été découvertes dans SCADA Schneider Electric Modicon. Elles permettent à un attaquant de provoquer une exécution de code arbitraire et un contournement de la politique de sécurité.

Official advisory ↗
CERT-FR · French · CERTFR-2018-AVI-146Multiples vulnérabilités dans SCADA Schneider Electric Modicon

De multiples vulnérabilités ont été découvertes dans SCADA Schneider Electric Modicon. Certaines d'entre elles permettent à un attaquant de provoquer une exécution de code arbitraire à distance, un déni de service à distance et un contournement de la politique de sécurité.

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2018-004277Schneider Electric Modicon Quantumにおける認可・権限・アクセス制御に関する脆弱性

Schneider Electric Modicon Quantumには、認可・権限・アクセス制御に関する脆弱性が存在します。

Official advisory ↗
03

Patch and workaround

Operational remediation based on structured source evidence.

Status
?Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.
Fix not verified
Affected
Modicon Quantum: All versions of Modicon Quantum communication modules
Fixed
No fixed version is explicitly recorded in the structured CVE data.
Action
No verified patch reference is present in the current structured sources. Check the vendor advisory before making a change.
Workaround
No verified workaround is recorded. If business-safe, reduce exposure to the affected interface and allow only trusted sources until authoritative guidance is available.
04

Evidence and provenance

Published 18 Apr 2018 · Last source change 5 Aug 2024, 06:24 UTC · CWE-787 · Out-of-bounds Write

CVE recordCVE.org · 5.1
CVSS sourceNIST NVD
EPSS source
?The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.
FIRST · tracked since 2026-09-01
European sourceENISA EUVD · EUVD-2018-18979
Product sourceCNA
Remediation sourceCVE/CNA references
CWE sourceNIST NVD
NVD statusNVD modified after enrichment

Core structured fields are present and their contributing authorities are shown above.

Material change intelligence

What changed after publication

View recent updates ↗
  1. Vendor guidanceAuthoritative vendor guidance changed from no authoritative guidance recorded to vendor advisory.
    Before
    no authoritative guidance recorded
    After
    vendor advisory
    af854a3a-2127-422b-91ae-364da2661108 ↗
  2. SeveritySeverity changed from Unknown to High.
    Before
    Unknown
    After
    High
    NIST NVD ↗
  3. CVSS scoreCVSS score changed from not recorded to 8.8 (CVSS 3.0 · NIST NVD · CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).
    Before
    not recorded
    After
    8.8 (CVSS 3.0 · NIST NVD · CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
    NIST NVD ↗
  4. ENISA EUVD mappingEUVD-2018-18979 was added to the official ENISA EUVD mapping for this CVE.
    Before
    not recorded
    After
    {"euvdId":"EUVD-2018-18979"}
    ENISA EUVD ↗
  5. Catalogue recordCVE added to the BlackTree catalogue.
    CNA ↗
Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
ENISA EUVD · EUVD-2018-18979↗CVE authority or vendor reference↗Official CVE record (CNA and ADP data)↗NVD record↗
Technical terms and abbreviations used in this report
CVE
Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS
Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS
Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE
Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA
CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP
Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD
National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT
A computer security incident response team that publishes warnings or coordinates incident response.
PoC
Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF
Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL
Living off the land: abuse of legitimate tools or system functions during an attack.
Free version - for non-commercial use only.CVE-2018-7240 · cve.blacktree.nl