CVE-2022-4608Network attack vector

Remote device restart via session parameter stack overflow

Published Jul 26, 2023 · Updated Mar 5, 2025

Out-of-bounds write in Hitachi Energy RTU500 Series firmware 13.3.1 and 13.3.2 allows remote attackers to restart the device. After the configured session-resumption interval expires, the HCI IEC 60870-5-104 stack overflows while processing an RTU500-initiated session-parameter update. The path is reachable without authentication only when IEC 62351-3 support is enabled, and the resulting device restart interrupts control communications.

CVSS severity7.5
High
EPSS probability0.71%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds write in Hitachi Energy RTU500 Series firmware 13.3.1 and 13.3.2 allows remote attackers to restart the device. After the configured session-resumption interval expires, the HCI IEC 60870-5-104 stack overflows while processing an RTU500-initiated session-parameter update. The path is reachable without authentication only when IEC 62351-3 support is enabled, and the resulting device restart interrupts control communications.

The record

CVE
CVE-2022-4608
Published
Jul 26, 2023
Updated
Mar 5, 2025
Vendor
Hitachi Energy
Product
RTU500 Series
Classifications
CWE-787, T0814
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 26, 2023CVE publishedPublication date reported by the CVE source.
  2. Mar 5, 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=RTU500 series CMU Firmware version 13.3.1
  2. Affected versionversion=RTU500 series CMU Firmware version 13.3.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Hitachi Energy · RTU500 Seriesversion=RTU500 series CMU Firmware version 13.3.1; version=RTU500 series CMU Firmware version 13.3.2

Published CVSS scores

7.5Hitachi EnergyCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
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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