CVE-2021-22772Network attack vector

Unauthenticated device operation via undisclosed critical function

Published Jul 21, 2021 · Updated Aug 3, 2024

Missing authentication in Schneider Electric Easergy T200 firmware allows remote attackers to perform unauthorized operations over the network. An undisclosed critical function accepts device operations when authentication is bypassed; Schneider Electric has not identified the function or request path. Network access without credentials is sufficient in the affected Modbus, IEC104, and DNP3 firmware, and the disclosed consequence is limited to unauthorized operation.

CVSS severity9.8
Critical
EPSS probability1.54%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authentication in Schneider Electric Easergy T200 firmware allows remote attackers to perform unauthorized operations over the network. An undisclosed critical function accepts device operations when authentication is bypassed; Schneider Electric has not identified the function or request path. Network access without credentials is sufficient in the affected Modbus, IEC104, and DNP3 firmware, and the disclosed consequence is limited to unauthorized operation.

The record

CVE
CVE-2021-22772
Published
Jul 21, 2021
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-306, T1692.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 21, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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?

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

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.5NIST NVDAV:N/AC:L/Au:N/C:P/I:P/A:P

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-306Missing Authentication for Critical Function
T1692.001Command Message

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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