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Fencer Vulns
medium 6.2

CVE-2021-22283 json

MMS File Transfer Vulnerability impact on Distribution Automation products

published 2023-02-28 3 y ago modified 2026-06-17 4 mo ago also EUVD-2021-9429

cvss
6.2
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 6%
public exploits
0
none known

Summary

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.

Patch / fix

  • ABB Relion protection relays - 611 series 2.0.3
  • ABB Relion protection relays - 615 series IEC 4.0 FP1 4.1.9
  • ABB Relion protection relays - 615 series CN 4.0 FP1 4.1.8
  • ABB Relion protection relays - 615 series IEC 5.0 5.0.12
  • ABB Relion protection relays - 615 series IEC 5.0 FP1 5.1.20
  • ABB Relion protection relays - 620 series IEC/CN 2.0 2.0.11
  • ABB Relion protection relays - 620 series IEC/CN 2.0 FP1 2.1.15
  • ABB Relion protection relays - REX640 PCL1 1.0.8
  • ABB Relion protection relays - REX640 PCL2 1.1.4
  • ABB Relion protection relays - REX640 PCL3 1.2.1
  • ABB Relion protection relays - RER615 2.0.3
  • ABB Remote Monitoring and Control - REC615 2.0.3
  • ABB Merging Unit- SMU615 1.0.2

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
20 mo ago

Exploit prediction

0.17% chance of exploitation in the next 30 days, higher than 6% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 6.2 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected products

  • 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

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.