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CVE-2025-3756— Denial of Service Vulnerabilities in System 800xA, Symphony® Plus IEC 61850

Quick assessment

Affected
ABB AC800M (System 800xA)
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

ABB AC800M等都是瑞士ABB公司的产品。ABB AC800M是一款面向工业自动化系统的模块化过程控制器。ABB Symphony Plus SD Series是一系列面向工业过程控制与分布式控制系统的控制与I/O设备。ABB Symphony Plus MR是一系列面向工业过程控制与分布式控制系统的控制与I/O设备。 ABB多款产品存在安全漏洞，该漏洞源于IEC 61850通信栈命令处理问题，可能导致拒绝服务攻击。以下产品和版本受到影响：AC800M 6.0.0x至6.0.0303.0版本、6.1

CVSS 6.5 · Medium EPSS 0.18% · P8

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2025-3756

Vulnerability Information
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Vulnerability Title
Denial of Service Vulnerabilities in System 800xA, Symphony® Plus IEC 61850
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1284
Source: CVE Program / CVE List V5
Vulnerability Title
ABB多款产品 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
ABB AC800M等都是瑞士ABB公司的产品。ABB AC800M是一款面向工业自动化系统的模块化过程控制器。ABB Symphony Plus SD Series是一系列面向工业过程控制与分布式控制系统的控制与I/O设备。ABB Symphony Plus MR是一系列面向工业过程控制与分布式控制系统的控制与I/O设备。 ABB多款产品存在安全漏洞，该漏洞源于IEC 61850通信栈命令处理问题，可能导致拒绝服务攻击。以下产品和版本受到影响：AC800M 6.0.0x至6.0.0303.0版本、6.1
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
ABB AC800M (System 800xA) 6.0.0x ~ 6.0.0303.0 -
ABB Symphony Plus SD Series A_0 -
ABB Symphony Plus MR (Melody Rack) 3.10 ~ 3.52 -
ABB S+ Operations 2.1 -

II. Public POCs for CVE-2025-3756

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III. Intelligence Information for CVE-2025-3756

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IV. Related Vulnerabilities

Same vendor: ABB
Same weakness: CWE-1284

V. Comments for CVE-2025-3756

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