CVE-2025-1445Network attack vector

Service interruption via unsynchronized IEC 61850 TLS renegotiation

Published Mar 25, 2025 · Updated Mar 25, 2025

Missing synchronization in Hitachi Energy RTU500 Series CMU Firmware 13.7.1 through 13.7.4 allows remote attackers to interrupt service. The IEC 61850 client and server stack fails to synchronize TLS renegotiation with active IEC 61850 communications, producing a timing-dependent availability failure. Exploitation requires IEC 61850 client or server operation with TLS configured and affects the CMU hosting the stack.

CVSS severity8.7
High
EPSS probability0.32%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing synchronization in Hitachi Energy RTU500 Series CMU Firmware 13.7.1 through 13.7.4 allows remote attackers to interrupt service. The IEC 61850 client and server stack fails to synchronize TLS renegotiation with active IEC 61850 communications, producing a timing-dependent availability failure. Exploitation requires IEC 61850 client or server operation with TLS configured and affects the CMU hosting the stack.

The record

CVE
CVE-2025-1445
Published
Mar 25, 2025
Updated
Mar 25, 2025
Vendor
Hitachi Energy
Product
RTU500 Series CMU Firmware
Classifications
CWE-820, T0814
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 25, 2025CVE publishedPublication date reported by the CVE source.
  2. Mar 25, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=13.7.1 <=13.7.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Hitachi Energy · RTU500 Series CMU Firmwareversion=13.7.1 <=13.7.4

Published CVSS scores

7.5Hitachi EnergyCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
8.7Hitachi EnergyCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:A/V:X/RE:X/U:X

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-820Missing Synchronization
T0814Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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