CVE-2025-3756 Details
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.
A denial-of-service vulnerability has been identified in the IEC 61850 communication stack of ABB's AC800M (System 800xA) and Symphony Plus products. This vulnerability allows an attacker with access to IEC 61850 networks to disrupt communication by sending specially crafted 61850 packets. The affected modules, PM 877, CI850, and CI868, can be forced into fault mode or made unavailable, causing a denial-of-service situation on the S+ Operations 61850 connectivity. However, the overall availability and functionality of the S+ Operations node remain unaffected. The vulnerability does not impact the System 800xA IEC61850 Connect.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Apr 13, 2026CISA-ADP
Assessed Apr 13, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://search.abb.com/library/Download.aspx?DocumentID=7PAA020125&LanguageCode=en&DocumentPartId=&Action=Launch | [email protected] | AdvisoryPermission RequiredVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-1284 | Improper Validation of Specified Quantity in Input | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| ABB AC800M | All versions |
CPE
Remediation
| |
| ABB Symphony Plus SD | All versions |
CPE
Remediation
| |
| ABB Symphony Plus MR | All versions |
CPE
Remediation
| |
| ABB S+ Operations | All versions |
CPE
Remediation
| |
Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Apr 13, 2026 | New CVE Received | [email protected] |