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No exploitation reportedFix available

CVE-2021-35534

No exploitation reported by the sources we read.

  • Published2021-11-18
  • WeaknessCWE-269 · CWE-274

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

Insufficient security control vulnerability in internal database access mechanism of Hitachi Energy Relion 670/650/SAM600-IO, Relion 650, GMS600, PWC600 allows attacker who successfully exploited this vulnerability, of which the product does not sufficiently restrict access to an internal database tables, could allow anybody with user credentials to bypass security controls that is enforced by the product. Consequently, exploitation may lead to unauthorized modifications on data/firmware, and/or to permanently disabling the product. This issue affects: Hitachi Energy Relion 670 Series 2.0 all revisions; 2.2.2 all revisions; 2.2.3 versions prior to 2.2.3.5. Hitachi Energy Relion 670/650 Series 2.1 all revisions. 2.2.0 all revisions; 2.2.4 all revisions; Hitachi Energy Relion 670/650/SAM600-IO 2.2.1 all revisions; 2.2.5 versions prior to 2.2.5.2. Hitachi Energy Relion 650 1.0 all revisions. 1.1 all revisions; 1.2 all revisions; 1.3 versions prior to 1.3.0.8; Hitachi Energy GMS600 1.3.0; 1.3.0.1; 1.2.0. Hitachi Energy PWC600 1.0.1 version 1.0.1.4 and prior versions; 1.1.0 version 1.1.0.1 and prior versions.

Timeline

dates in UTC
  1. 2021-11-1817:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2021-35534?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2021-35534?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Hitachienergy relion 650 firmwareversion to verify
BranchAffectedFixed in
1.0= 1.0.0no fix published
1.1= 1.1.0no fix published
1.2= 1.2.0no fix published
1.3= 1.3.0no fix published
2.1= 2.1.0no fix published
2.2= 2.2.0no fix published
2.2= 2.2.1no fix published
2.2= 2.2.4no fix published
2.2= 2.2.5no fix published
Hitachienergy relion 670 firmwareversion to verify
BranchAffectedFixed in
—all versionsno fix published
2.0= 2.0.0no fix published
2.1= 2.1.0no fix published
2.2= 2.2.0no fix published
2.2= 2.2.1no fix published
2.2= 2.2.2no fix published
2.2= 2.2.3no fix published
2.2= 2.2.4no fix published
2.2= 2.2.5no fix published
Hitachienergy pwc600 firmwareversion to verify
BranchAffectedFixed in
1.0= 1.0.1.0no fix published
1.0= 1.0.1.1no fix published
1.0= 1.0.1.3no fix published
1.0= 1.0.1.4no fix published
1.1= 1.1.0.0no fix published
1.1= 1.1.0.1no fix published

2 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

  • ICSA-21-343-01 CISA21 known affected

    Hitachi Energy GMS600, PWC600, and Relion

    PWC600: Version 1.0.1.0 · Relion 650 series: Version 1.2 all revisions · Relion 650 series: Version 1.3 all revisions · +18 more

  • ICSA-25-065-02 CISA18 known affected

    Hitachi Energy Relion 670/650/SAM600-IO

    Hitachi Energy Relion 670 series version 2.0.0 revisions up to 2.0.0.13 · Hitachi Energy Relion 670 series version 2.1.0 revisions up to 2.1.0.4 · Hitachi Energy Relion 670 series version 2.2.0 all revisions · +15 more

Full record on NVD

Fix

  1. Vendor fix CISA ICSA-21-343-01 · 21 productsRelion 650 series Version 1.3: Update to Version 1.3.0.8
  2. Vendor fix CISA ICSA-21-343-01 · 21 productsRelion 650 series Version 1.2: Update to Version 1.3
  3. Vendor fix CISA ICSA-25-065-02 · 3 productsUpdate to Relion 670/650/SAM600-IO series version 2.2.1.8
  4. Vendor fix CISA ICSA-25-065-02 · 1 productUpdate to Relion 670 series version 2.2.2.5
  5. Vendor fix CISA ICSA-25-065-02 · 1 productUpdate to Relion 670 series version 2.2.3.5
  6. Vendor fix CISA ICSA-25-065-02 · 2 productsUpdate to Relion 670/650 series version 2.2.4.3

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub

Sources

  • CNACVSS 3.17.2read 2026-10-23
  • NVDCVSS 3.17.2read 2026-10-23
  • NVDCVSS 2.09read 2026-10-23
  • CNAweakness (CWE)CWE-274read 2026-10-23
  • NVDweakness (CWE)CWE-269read 2026-10-23
  • FIRST EPSSEPSS score1.8 %2026-10-22

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Published
2021-11-18
Last Modified
2026-06-17
NVD status
Modified

Frequently asked questions

What is CVE-2021-35534?

Insufficient security control vulnerability in internal database access mechanism of Hitachi Energy Relion 670/650/SAM600-IO, Relion 650, GMS600, PWC600 allows attacker who successfully exploited this vulnerability, of which the product does not sufficiently restrict access to an internal database tables, could allow anybody with user credentials to bypass security controls that is enforced by the product. Consequently, exploitation may lead to unauthorized modifications on data/firmware, and/or to permanently disabling the product. This issue affects: Hitachi Energy Relion 670 Series 2.0 all revisions; 2.2.2 all revisions; 2.2.3 versions prior to 2.2.3.5. Hitachi Energy Relion 670/650 Series 2.1 all revisions. 2.2.0 all revisions; 2.2.4 all revisions; Hitachi Energy Relion 670/650/SAM600-IO 2.2.1 all revisions; 2.2.5 versions prior to 2.2.5.2. Hitachi Energy Relion 650 1.0 all revisions. 1.1 all revisions; 1.2 all revisions; 1.3 versions prior to 1.3.0.8; Hitachi Energy GMS600 1.3.0; 1.3.0.1; 1.2.0. Hitachi Energy PWC600 1.0.1 version 1.0.1.4 and prior versions; 1.1.0 version 1.1.0.1 and prior versions.

Is CVE-2021-35534 actively exploited?

Active exploitation of CVE-2021-35534 has not been confirmed. Its EPSS score was 1.8% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-35534?

CVE-2021-35534 has a CVSS v3 base score of 7.2 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.

Running Hitachi Energy Relion? Hear about its next vulnerability

Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».

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