CVE-2022-34759Network attack vector

Webserver DoS via malformed HTTP headers

Published Jul 13, 2022 · Updated Sep 16, 2024

Out-of-bounds write in Schneider Electric BMENUA0100 before V1.10 allows remote attackers to cause webserver denial of service via HTTP headers. The module webserver improperly parses crafted HTTP header data and writes beyond a memory boundary. An unauthenticated network request can interrupt webserver availability, with no documented confidentiality or integrity impact.

CVSS severity7.5
High
EPSS probability0.76%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds write in Schneider Electric BMENUA0100 before V1.10 allows remote attackers to cause webserver denial of service via HTTP headers. The module webserver improperly parses crafted HTTP header data and writes beyond a memory boundary. An unauthenticated network request can interrupt webserver availability, with no documented confidentiality or integrity impact.

The record

CVE
CVE-2022-34759
Published
Jul 13, 2022
Updated
Sep 16, 2024
Vendor
Schneider Electric
Product
BMENOR2200H Advanced RTU Communication Module
Classifications
CWE-787, T1499.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 13, 2022CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=BMENOR2200H V1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Schneider Electric · BMENOR2200H Advanced RTU Communication Moduleversion=BMENOR2200H V1.0
Schneider Electric · BMENUA0100 OPC UA Communication Moduleversion=BMENUA0100 <V1.10

Published CVSS scores

7.5Schneider Electric SECVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1499.002Service Exhaustion

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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