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CVE record · CVE-2025-3756

Denial of Service Vulnerabilities in System 800xA, Symphony® Plus IEC 61850

CVSS 7.1 HighEPSS 0.0018 · 8th percentile

Published by the CVE Program (CNA: ABB) at 13 Apr 2026, 17:11 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
VendorProductVersions
ABB AC800M (System 800xA)
  • affected 6.0.0x to 6.0.0303.0, inclusive custom
  • affected 6.1.0x to 6.1.0031.0, inclusive custom
  • affected 6.1.1x to 6.1.1004.0, inclusive custom
  • affected 6.1.1x to 6.1.1202.0, inclusive custom
  • affected 6.2.0x to 6.2.0006.0, inclusive custom
Other versions: unaffected
ABB Symphony Plus SD Series
  • affected 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
Other versions: unaffected
ABB Symphony Plus MR (Melody Rack)
  • affected 3.10 to 3.52, inclusive custom
Other versions: unaffected
ABB S+ Operations
  • affected 2.1 custom
  • affected 2.2 custom
  • affected 2.3 custom
  • affected 3.3 custom
Other versions: unaffected
Identifiers
CVE-2025-3756
CNA
ABB
Weakness (CWE)
CWE-1284
Tags
Published
13 Apr 2026
Updated
13 Apr 2026

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

ScoreRatingCVSSVectorSource
7.1 High 4.0 CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CNA (ABB)Used for this record
6.5 Medium 3.1 CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CNA (ABB)
  • CISA KEV Not listed.
  • EPSS 0.0018, the 8th percentile, on 8 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 13 Apr 2026. New records show when each source confirmed them.

Sources

References from the CNA

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.