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Description

A vulnerability exists in the command handling of the IEC 61850 communication stack included in the product revisions listed as affected in this CVE. An attacker with access to IEC 61850 networks could exploit the vulnera bility by using a specially crafted 61850 packet, forcing the communication interfaces of the PM 877, CI850 and CI868 modules into fault mode or causing unavailability of the S+ Operations 61850 connectivity, resulting in a denial-of-service situation. The System 800xA IEC61850 Connect is not affected. Note: This vulnerability does not impact on the overall availability and functionality of the S+ Operations node, only the 61850 communication function. This issue affects AC800M (System 800xA): from 6.0.0x through 6.0.0303.0, from 6.1.0x through 6.1.0031.0, from 6.1.1x through 6.1.1004.0, from 6.1.1x through 6.1.1202.0, from 6.2.0x through 6.2.0006.0; Symphony Plus SD Series: A_0, A_1, A_2.003, A_3.005, A_4.001, B_0.005; Symphony Plus MR (Melody Rack): from 3.10 through 3.52; S+ Operations: 2.1, 2.2, 2.3, 3.3.

PUBLISHED Reserved 2025-04-17 | Published 2026-04-13 | Updated 2026-04-13 | Assigner ABB




HIGH: 7.1CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

MEDIUM: 6.5CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Problem types

CWE-1284 Improper validation of specified quantity in input

Product status

Default status
unaffected

6.0.0x (custom)
affected

6.1.0x (custom)
affected

6.1.1x (custom)
affected

6.1.1x (custom)
affected

6.2.0x (custom)
affected

Default status
unaffected

A_0 (custom)
affected

A_1 (custom)
affected

A_2.003 (custom)
affected

A_3.005 (custom)
affected

A_4.001 (custom)
affected

B_0.005 (custom)
affected

Default status
unaffected

3.10 (custom)
affected

Default status
unaffected

2.1 (custom)
affected

2.2 (custom)
affected

2.3 (custom)
affected

3.3 (custom)
affected

Credits

ABB thanks Hitachi Energy for sharing the information affecting a commonly used software component. finder

References

search.abb.com/...guageCode=en&DocumentPartId=&Action=Launch

cve.org (CVE-2025-3756)

nvd.nist.gov (CVE-2025-3756)

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