What’s Vulnerable › Vulnerabilities

CVE-2021-22283: MMS File Transfer Vulnerability impact on Distribution Automation products

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-02-28 · updated 2026-06-17
• Weakness: CWE-665

Description

Improper Initialization vulnerability in ABB Relion protection relays - 611 series, ABB Relion protection relays - 615 series IEC 4.0 FP1, ABB Relion protection relays - 615 series CN 4.0 FP1, ABB Relion protection relays - 615 series IEC 5.0, ABB Relion protection relays - 615 series IEC 5.0 FP1, ABB Relion protection relays - 620 series IEC/CN 2.0, ABB Relion protection relays - 620 series IEC/CN 2.0 FP1, ABB Relion protection relays - REX640 PCL1, ABB Relion protection relays - REX640 PCL2, ABB Relion protection relays - REX640 PCL3, ABB Relion protection relays - RER615, ABB Remote Monitoring and Control - REC615, ABB Merging Unit- SMU615 allows Communication Channel Manipulation.This issue affects Relion protection relays - 611 series: from 1.0.0 before 2.0.3; Relion protection relays - 615 series IEC 4.0 FP1: from 4.1.0 before 4.1.9; Relion protection relays - 615 series CN 4.0 FP1: from 4.1.0 before 4.1.8; Relion protection relays - 615 series IEC 5.0: from 5.0.0 before 5.0.12; Relion protection relays - 615 series IEC 5.0 FP1: from 5.1.0 before 5.1.20; Relion protection relays - 620 series IEC/CN 2.0: from 2.0.0 before 2.0.11; Relion protection relays - 620 series IEC/CN 2.0 FP1: from 2.1.0 before 2.1.15; Relion protection relays - REX640 PCL1: from 1.0.0 before 1.0.8; Relion protection relays - REX640 PCL2: from 1.1.0 before 1.1.4; Relion protection relays - REX640 PCL3: from 1.2.0 before 1.2.1; Relion protection relays - RER615: from 2.0.0 before 2.0.3; Remote Monitoring and Control - REC615: from 1.0.0 before 2.0.3; Merging Unit- SMU615: from 1.0.0 before 1.0.2.

Affected products

• ABB Evd4 Firmware: all versions
• ABB Rec615 Firmware: before 2.0.3 — fixed in 2.0.3
• ABB Red615 Iec Firmware: all versions
• ABB Ref615 Ansi Firmware: all versions
• ABB Ref615 Iec Firmware: all versions
• ABB Ref615R Firmware: all versions
• ABB Relion 611 Firmware: before 2.0.3 — fixed in 2.0.3
• ABB Relion 615 Ansi Firmware: all versions
• ABB Relion 615 Cn Firmware: before 4.1.8 — fixed in 4.1.8
• ABB Relion 615 Iec Firmware: before 4.1.9; before 5.0.12; before 5.1.20 — fixed in 4.1.9, 5.0.12, 5.1.20
• ABB Relion 620 Ansi Firmware: all versions
• ABB Relion 620 Cn Firmware: before 2.0.11; before 2.1.15 — fixed in 2.0.11, 2.1.15
• ABB Relion 620 Iec Firmware: before 2.0.11; before 2.1.15 — fixed in 2.0.11, 2.1.15
• ABB Rer615 Firmware: before 2.0.3 — fixed in 2.0.3
• ABB Rer620 Firmware: all versions
• ABB Rex640 Pcl1 Firmware: before 1.0.8 — fixed in 1.0.8
• ABB Rex640 Pcl2 Firmware: before 1.1.4 — fixed in 1.1.4
• ABB Rex640 Pcl3 Firmware: before 1.2.1 — fixed in 1.2.1
• ABB Smu615 Firmware: before 1.0.2 — fixed in 1.0.2

How to fix

Upgrade to a fixed version: ABB Rec615 Firmware 2.0.3; ABB Relion 611 Firmware 2.0.3; ABB Relion 615 Cn Firmware 4.1.8; ABB Relion 615 Iec Firmware 4.1.9, 5.0.12, 5.1.20; ABB Relion 620 Cn Firmware 2.0.11, 2.1.15; ABB Relion 620 Iec Firmware 2.0.11, 2.1.15; ABB Rer615 Firmware 2.0.3; ABB Rex640 Pcl1 Firmware 1.0.8; ABB Rex640 Pcl2 Firmware 1.1.4; ABB Rex640 Pcl3 Firmware 1.2.1; ABB Smu615 Firmware 1.0.2. Check the vendor advisory for mitigations.

References

• https://search.abb.com/library/Download.aspx?DocumentID=2NGA001147&LanguageCode=en&DocumentPartId=&Action=Launch
• https://search.abb.com/library/Download.aspx?DocumentID=2NGA001147&LanguageCode=en&DocumentPartId=&Action=Launch

Get alerted when CVE-2021-22283 or the next vulnerability affects your stack