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NVD / CVE Program· CNA Hitachi Energy

CVE-2022-2081: A vulnerability exists in the HCI Modbus TCP function included in the product versions listed above.

Noroxi assessment

Priority: Monitor (action score 30/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.63% (FIRST EPSS); higher than 50.4% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • According to CISA the attack is automatable: targets can be found by mass scanning.
  • According to the record, no fixed version is available yet.

Low priority for now. Update when a fix is released; follow the vendor's advisory.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

A vulnerability exists in the HCI Modbus TCP function included in the product versions listed above. If the HCI Modbus TCP is enabled and configured, an attacker could exploit the vulnerability by sending a specially crafted message to the RTU500 in a high rate, causing the targeted RTU500 CMU to reboot. The vulnerability is caused by a lack of flood control which eventually if exploited causes an internal stack overflow in the HCI Modbus TCP function.

HighCVSS 7.5 · v3.1—No exploit No fix recorded
Published
Jan 4, 2024
Updated
Jun 17, 2026
EPSS
0.6% · 50th percentile

Report tools

JSON

Action score

30

Monitor

Low priority for now.

CVSS
30 / 40 · 7.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.6%

CISA SSVC decision

Exploitation
none
Automatable
yes
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
7.5
CNA · Hitachi Energy
7.5
agree

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • No fixed version yet

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2022-2081

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
hitachienergyrtu520 firmware
hitachienergyrtu520
hitachienergyrtu530 firmware
hitachienergyrtu530
hitachienergyrtu540 firmware
hitachienergyrtu540
hitachienergyrtu560 firmware
hitachienergyrtu560

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • hitachienergy rtu520 firmware12.0.1 and later · up to 12.0.13 inclusive
  • hitachienergy rtu520 firmware12.2.1 and later · up to 12.2.11 inclusive
  • hitachienergy rtu520 firmware12.4.1 and later · up to 12.4.11 inclusive
  • hitachienergy rtu520 firmware12.6.1 and later · up to 12.6.7 inclusive
  • hitachienergy rtu520 firmware12.7.1 and later · up to 12.7.3 inclusive
  • hitachienergy rtu520 firmware13.2.1 and later · up to 13.2.4 inclusive
  • hitachienergy rtu520 firmware13.3.1
  • hitachienergy rtu530 firmware12.0.1 and later · up to 12.0.13 inclusive
  • hitachienergy rtu530 firmware12.2.1 and later · up to 12.2.11 inclusive
  • hitachienergy rtu530 firmware12.4.1 and later · up to 12.4.11 inclusive
  • hitachienergy rtu530 firmware12.6.1 and later · up to 12.6.7 inclusive
  • hitachienergy rtu530 firmware12.7.1 and later · up to 12.7.3 inclusive
  • hitachienergy rtu530 firmware13.2.1 and later · up to 13.2.4 inclusive
  • hitachienergy rtu530 firmware13.3.1
  • hitachienergy rtu540 firmware12.0.1 and later · up to 12.0.13 inclusive
  • hitachienergy rtu540 firmware12.2.1 and later · up to 12.2.11 inclusive
  • hitachienergy rtu540 firmware12.4.1 and later · up to 12.4.11 inclusive
  • hitachienergy rtu540 firmware12.6.1 and later · up to 12.6.7 inclusive
  • hitachienergy rtu540 firmware12.7.1 and later · up to 12.7.3 inclusive
  • hitachienergy rtu540 firmware13.2.1 and later · up to 13.2.4 inclusive

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Hitachi Energy). Independent of NVD's CPE analysis and usually ahead of it.

  • Hitachi Energy RTU500 series CMU firmware

    • 13.3.1.0affected
    • 12.0.1.0 and later · up to and including 12.0.13.0affected
    • 12.2.1.0 and later · up to and including 12.2.11.0affected
    • 12.4.1.0 and later · up to and including 12.4.11.0affected
    • 12.6.1.0 and later · up to and including 12.6.7.0affected
    • 12.7.1.0 and later · up to and including 12.7.3.0affected
    • 13.2.1.0 and later · up to and including 13.2.4.0affected

Same product

hitachienergy: all records

Other highest-scoring records for the same primary product.

  • CVE-2023-5769 A vulnerability exists in the webserver that affects the RTU500 series product versions listed below.
    24Monitor
  • CVE-2023-5768A vulnerability exists in the HCI IEC 60870-5-104 that affects the RTU500 series product versions listed below.
    24Monitor
  • CVE-2023-5767 A vulnerability exists in the webserver that affects the RTU500 series product versions listed below.
    24Monitor

Published before and after this one in the same product

  • Later →CVE-2026-1772Feb 24, 2026 · RTU500 web interface: An unprivileged user can read user management information.
    21Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-787 · Out-of-bounds Write

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records