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CVE-2018-7809

31
FAUCET Score

CVE-2018-7809 is a critical unverified password change vulnerability affecting the embedded web servers in Schneider Electric Modicon M340, Premium, Quantum PLCs, and BMXNOR0200. This flaw allows an unauthenticated remote attacker to access and utilize the password deletion function, potentially leading to complete compromise of the affected devices. With a CVSS score of 9.8, this vulnerability is easily exploitable over the network with low attack complexity, resulting in high impacts to confidentiality, integrity, and availability. Despite its severity, there is currently no known active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
All Versions ImpactedCPE matchmatch criteria
cpe:2.3:o:schneider-electric:modicom_m340_firmware:*:*:*:*:*:*:*:*
All Versions ImpactedCPE matchmatch criteria
cpe:2.3:o:schneider-electric:modicom_premium_firmware:*:*:*:*:*:*:*:*
All Versions ImpactedCPE matchmatch criteria
cpe:2.3:o:schneider-electric:modicom_quantum_firmware:*:*:*:*:*:*:*:*
All Versions ImpactedCPE matchmatch criteria
cpe:2.3:o:schneider-electric:modicom_bmxnor0200h_firmware:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.8CRITICAL

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
2.47%
Probability of exploitation in next 30 days
EPSS Percentile
82.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0247 is in the 73rd percentile among its peer group of 36,835 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (3)

dogukanurkervendor investigatingvia llm_extracted
posthogvendor investigatingvia llm_extracted
qlikvendor investigatingvia llm_extracted

Vendor Advisories (3)

dogukanurkerllm-dogukanurker-92e072ae22f3c89cCRITICAL

[R1] Multiple Schneider Electric Modicon Quantum Vulnerabilities

Nov 26, 2018
qlikllm-qlik-a4dee9547df83d7aCRITICAL

[R1] Multiple Schneider Electric Modicon Quantum Vulnerabilities

Nov 26, 2018
posthogllm-posthog-6af3eed3a46929e8CRITICAL

[R1] Multiple Schneider Electric Modicon Quantum Vulnerabilities

Nov 26, 2018

References

schneider-electric.com / en/download/document/SEVD-2018-327-01
Vendor Advisory
tenable.com / security/research/tra-2018-38
ExploitThird Party Advisory