CVE-2020-7534Network attack vector

Data disclosure and unauthorized actions via CSRF

Published Feb 4, 2022 · Updated May 28, 2026

CSRF in Schneider Electric Modicon M340, Quantum, and Premium embedded web servers in all versions allows remote attackers to alter or read data. The embedded web server accepts an attacker-induced request under a user's active authenticated session without verifying that the user intentionally submitted it. Exploitation requires the user to remain logged in and interact with attacker-controlled content, enabling actions with the user's permissions or disclosure of sensitive data.

CVSS severity8.8
High
EPSS probability0.36%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

CSRF in Schneider Electric Modicon M340, Quantum, and Premium embedded web servers in all versions allows remote attackers to alter or read data. The embedded web server accepts an attacker-induced request under a user's active authenticated session without verifying that the user intentionally submitted it. Exploitation requires the user to remain logged in and interact with attacker-controlled content, enabling actions with the user's permissions or disclosure of sensitive data.

The record

CVE
CVE-2020-7534
Published
Feb 4, 2022
Updated
May 28, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-352
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 4, 2022CVE publishedPublication date reported by the CVE source.
  2. May 28, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
6.8NIST NVDAV:N/AC:M/Au:N/C:P/I:P/A:P
7.1CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-352Cross-Site Request Forgery (CSRF)

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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