CVE-2021-35526

Sensitive-information disclosure via unencrypted backup files

Published Sep 8, 2021 · Updated Sep 16, 2024

Cleartext backup storage in Hitachi Energy MicroSCADA X SDM600 1.2 before FP2 HF6 allows local users to read sensitive information. The backup function writes backup contents without encryption or password protection, leaving their sensitive contents readable at rest. A low-privileged local account and access to a backup file are required; the disclosed consequence is limited to information exposure.

CVSS severity7.8
High
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cleartext backup storage in Hitachi Energy MicroSCADA X SDM600 1.2 before FP2 HF6 allows local users to read sensitive information. The backup function writes backup contents without encryption or password protection, leaving their sensitive contents readable at rest. A low-privileged local account and access to a backup file are required; the disclosed consequence is limited to information exposure.

The record

CVE
CVE-2021-35526
Published
Sep 8, 2021
Updated
Sep 16, 2024
Vendor
Hitachi Energy
Product
MicroSCADA X SDM600
Classifications
CWE-312, CWE-863, T1005
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 8, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 2024Record 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=1.2 <FP2 HF6

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Hitachi Energy · MicroSCADA X SDM600version=1.2 <FP2 HF6

Published CVSS scores

7.2NIST NVDAV:L/AC:L/Au:N/C:C/I:C/A:C
7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-312Cleartext Storage of Sensitive Information
CWE-863Incorrect Authorization
T1005Data from Local System

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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