No exploitation reported

CVE-2021-22772

No exploitation reported by the sources we read.

Published2021-07-21
WeaknessCWE-306

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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.

Timeline

dates in UTC

2021-07-2115:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2021-22772?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2021-22772?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Schneider-electric t200e firmwareversion to verify

Branch	Affected	Fixed in	Source
—	≤ sc2-04mod-07000100	no fix published	NVD
—	≤ sc2-04iec-07000100	no fix published	NVD
—	≤ sc2-04dnp-07000102	no fix published	NVD

Schneider-electric t200i firmwareversion to verify

Branch	Affected	Fixed in	Source
—	≤ sc2-04mod-07000100	no fix published	NVD
—	≤ sc2-04iec-07000100	no fix published	NVD
—	≤ sc2-04dnp-07000102	no fix published	NVD

Schneider-electric t200p firmwareversion to verify

Branch	Affected	Fixed in	Source
—	≤ sc2-04mod-07000100	no fix published	NVD
—	≤ sc2-04iec-07000100	no fix published	NVD
—	≤ sc2-04dnp-07000102	no fix published	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Advisories and patches

download.schneider-electric.comVendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVSS 3.19.8read 2026-10-23
NVDCVSS 2.07.5read 2026-10-23
CNAweakness (CWE)CWE-306read 2026-10-23
NVDweakness (CWE)CWE-306read 2026-10-23
FIRST EPSSEPSS score1.5 %2026-10-23

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published: 2021-07-21
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2021-22772?

Is CVE-2021-22772 actively exploited?

Active exploitation of CVE-2021-22772 has not been confirmed. Its EPSS score was 1.5% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-22772?

CVE-2021-22772 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Hear about the next vulnerability in your software

Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».

Get alerts for this product CISA KEV additions, October 2026 Search CVEs

No credit card required · No monthly cap on website lookups · 250 API requests/month

Go further

Following what attackers exploit right now? The CISA KEV additions of the month, with their patch deadlines.
Running this software? Vulnerability monitoring alerts you to new vulnerabilities in your products.

Related vulnerabilities

Same product first, then the same vendor advisory and the same publication week.

Back to CVE Database