CVE-2026-1772

mediumpriority · track · 21EPSS 0.003 · 21 %ileDEEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.29% (21st) EPSS

CVSS 5.3 · medium

Is it mine?

36 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · cert_bund · cisa_csaf_ot

EPSS · scored 2026-10-23

RTU500 web interface: An unprivileged user can read user management information. The information cannot be accessed via the RTU500 web user interface but requires further tools like browser development utilities to access them without required privileges.

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

FixedRTU500 series CMU Firmwarecisa_csaf_ot
Update to CMU Firmware version 12.7.8
MitigationRTU500 series CMU Firmwarecisa_csaf_ot
Follow general mitigation factors/workarounds

cvss

Technical severity, 0–10. One row per scoring source.

5.3

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–medium · 1.3–5.3

v3.15.3mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:Nprimary · NVD / NIST USexploitability 3.9 · impact 1.4

v3.14.3mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:Nsecondary · CISA US

v4.05.3mediumCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:Nsecondary · ENISA EU

v4.05.3mediumCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/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:X/V:X/RE:X/U:Xsecondary · cybersecurity@hitachienergy.com

v4.01.3lowCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/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:X/V:X/RE:X/U:Xsecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-280USCWE-280US

affected products (36)

Products and version ranges known to be affected.

Hitachi Energy RTU500 CMU Firmware <12.7.8all versionscert_bundDE
Hitachi Energy RTU500 CMU Firmware <13.7.8all versionscert_bundDE
Hitachi Energy RTU500 CMU Firmware <13.8.2all versionscert_bundDE
Hitachi Energy RTU500≤ CMU Firmware <12.7.8cert_bundDE
Hitachi Energy RTU500≤ CMU Firmware <13.7.8cert_bundDE
Hitachi Energy RTU500≤ CMU Firmware <13.8.2cert_bundDE
Hitachi Energy RTU500 series CMU Firmwareall versionscisa_csaf_otUS
Hitachi Energy RTU500 series CMU Firmware≤ vers:RTU500_series_CMU_Firmware/>=12.7.1|<=12.7.7cisa_csaf_otUS
Hitachi Energy RTU500 series CMU Firmware≤ vers:RTU500_series_CMU_Firmware/>=13.5.1|<=13.5.4cisa_csaf_otUS
Hitachi Energy RTU500 series CMU Firmware≤ vers:RTU500_series_CMU_Firmware/>=13.6.1|<=13.6.2cisa_csaf_otUS
Hitachi Energy RTU500 series CMU Firmware≤ vers:RTU500_series_CMU_Firmware/>=13.7.1|<=13.7.7cisa_csaf_otUS
Hitachi Energy RTU500 series CMU Firmware≤ 13.5.1 ≤13.5.4enisa_euvdEU
Hitachi Energy RTU500 series CMU Firmware≤ 13.7.1 ≤13.7.7enisa_euvdEU
Hitachi Energy RTU500 series CMU Firmware≤ 13.8.1enisa_euvdEU
Hitachi Energy RTU500 series CMU Firmware≤ 12.7.1 ≤12.7.7enisa_euvdEU
Hitachi Energy RTU500 series CMU Firmware≤ 13.6.1 ≤13.6.2enisa_euvdEU
hitachienergy rtu520 firmware12.7.1 → 12.7.7nvdUScpe:2.3:o:hitachienergy:rtu520_firmware:*:*:*:*:*:*:*:*
hitachienergy rtu520 firmware13.5.1 → 13.5.4nvdUScpe:2.3:o:hitachienergy:rtu520_firmware:*:*:*:*:*:*:*:*
hitachienergy rtu520 firmware13.6.1 → 13.6.2nvdUScpe:2.3:o:hitachienergy:rtu520_firmware:*:*:*:*:*:*:*:*
hitachienergy rtu520 firmware13.7.1 → 13.7.8nvdUScpe:2.3:o:hitachienergy:rtu520_firmware:*:*:*:*:*:*:*:*

showing 20 of 36

advisories (2)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-0503Hitachi Energy RTU500: Mehrere SchwachstellenDeutsch2026-02-24csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Hitachi Energy RTU500 ausnutzen, um Informationen offenzulegen, und um einen Denial of Service Angriff durchzuführen.
ICSA-26-062-03Hitachi Energy RTU500 Product (Update A)2026-02-24icsa · cisa_csaf_otUS
Hitachi Energy is aware of vulnerabilities that affect RTU500 product versions listed in this document. Successful exploitation of these vulnerabilities can result in the exposure of low-value user management information and device outage. Please refer to the Recommended Immediate Actions for information about the mitigation/remediation.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cert_bund cisa_csaf_ot nvd NVD CVE.org MITRE

published 2026-02-24modified 2026-06-17

references (3)

External citations — patches, advisories, analysis.

scry

Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.

Free scan