CVE-2022-34756

Code execution or HTTPS-stack crash via unchecked copy

Published Jul 13, 2022 · Updated Sep 17, 2024

A buffer overflow in Schneider Electric Easergy P5 before V01.401.102 allows remote attackers to execute code or crash the Web HMI HTTPS stack. The HTTPS stack copies attacker-controlled Web HMI input without first checking that it fits; Schneider Electric has not disclosed the specific request field or code locus. The device must be reachable on an adjacent network with HTTPS enabled; no authentication or user interaction is required, and exploitation runs code or interrupts Web HMI service.

CVSS severity8.8
High
EPSS probability1.57%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A buffer overflow in Schneider Electric Easergy P5 before V01.401.102 allows remote attackers to execute code or crash the Web HMI HTTPS stack. The HTTPS stack copies attacker-controlled Web HMI input without first checking that it fits; Schneider Electric has not disclosed the specific request field or code locus. The device must be reachable on an adjacent network with HTTPS enabled; no authentication or user interaction is required, and exploitation runs code or interrupts Web HMI service.

The record

CVE
CVE-2022-34756
Published
Jul 13, 2022
Updated
Sep 17, 2024
Vendor
Schneider Electric
Product
Easergy P5
Classifications
CWE-120, T0866
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 13, 2022CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 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=Firmware <V01.401.102

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Schneider Electric · Easergy P5version=Firmware <V01.401.102

Published CVSS scores

8.8Schneider ElectricCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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.

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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)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
T0866Exploitation of Remote Services

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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