CVE-2025-3116Network attack vector

Authenticated service interruption via malformed HTTPS body

Published Jun 10, 2025 · Updated Jun 10, 2025

Improper input validation in Schneider Electric Modicon M241/M251 and M258/LMC058 controllers allows authenticated users to interrupt service via HTTPS. The controller's HTTPS request processing accepts a specially malformed body instead of rejecting its improper format, causing denial of service. Authentication is required; M241/M251 releases before 5.3.12.51 and all M258/LMC058 versions are affected.

CVSS severity7.1
High
EPSS probability0.45%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in Schneider Electric Modicon M241/M251 and M258/LMC058 controllers allows authenticated users to interrupt service via HTTPS. The controller's HTTPS request processing accepts a specially malformed body instead of rejecting its improper format, causing denial of service. Authentication is required; M241/M251 releases before 5.3.12.51 and all M258/LMC058 versions are affected.

The record

CVE
CVE-2025-3116
Published
Jun 10, 2025
Updated
Jun 10, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-20, T0814
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 10, 2025CVE publishedPublication date reported by the CVE source.
  2. Jun 10, 2025Record 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 privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.5Schneider Electric SECVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
7.1Schneider Electric SECVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA: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.

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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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation
T0814Denial of Service

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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