CVE-2021-22772

9.8 CRITICAL 2% exploit odds Fix listed Auth & access Device

What it is

A CWE-306: Missing Authentication for Critical Function vulnerability exists in Easergy T200 ((Modbus) SC2-04MOD-07000100 and earlier), Easergy T200 ((IEC104) SC2-04IEC-07000100 and earlier), and Easergy T200 ((DNP3) SC2-04DNP-07000102 and earlier) that could cause unauthorized operation when authentication is bypassed.

At a glance

Exploitability: Can be exploited over the network without logging in. High risk of data exposure, data tampering, service disruption.
Exploit odds: 1.5% chance of exploitation in the next 30 days (EPSS).
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2021-07-21 15:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-06-17 03:37 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: no, CISA does not list it.
Exploit odds: 1.5% in the next 30 days (EPSS).
Severity: 9.8 CRITICAL (CVSS).
Fix: a patch or advisory is linked.

Details

Published: 2021-07-21 15:15 UTC
Last modified: 2026-06-17 03:37 UTC
Exploit probability: 1.5% · EPSS, next 30 days
Weakness: CWE-306 · Missing authentication
Record status: Modified

Affected

schneider-electric t200i Firmware ≤ sc2-04mod-07000100
schneider-electric t200i Firmware ≤ sc2-04iec-07000100
schneider-electric t200i Firmware ≤ sc2-04dnp-07000102
schneider-electric t200e Firmware ≤ sc2-04mod-07000100
schneider-electric t200e Firmware ≤ sc2-04iec-07000100
schneider-electric t200e Firmware ≤ sc2-04dnp-07000102
schneider-electric t200p Firmware ≤ sc2-04mod-07000100
schneider-electric t200p Firmware ≤ sc2-04iec-07000100

Attack profile CVSS 3.1 · 9.8

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None
Scope: Unchanged
Confidentiality: High
Integrity: High
Availability: High

Raw vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Is it in your code?

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Fix and advisories

References

NVD record · CVE.org record